Looking for a non-harem non-dense MC and well-written Isekai

[Bigrand]

Basically I don't want to deal with the usual cliches of MC being super dense, annoying and stupid. I don't want harems, oversexualization of women and no pedophilia/lolicon. Obviously finding a manga with this criteria seems a little bit implausible especially for an Isekai, but I conform if there's anything that comes close or isn't too annoying with it. The most important one is that it must be interesting, not the same demonking/hero cliche, and I would love if it, at least, tries to represent a magical world somewhat realistically, with the dark side too.

I haven't read much mangas, but I have watched popular Isekai Animes, like Overlord, Mushoku Tensei (I read the whole the light novel), Konosuba, the slime one, The eminence in shadow (read the light novel too), and a lot more (probably, I don't remember well).

Thank you beforehand.

 

[Kalashnikov413]

Nihonkoku Shoukan. It's an anime where literally the WHOLE Japan got isekai'ed and they doing some political and military stuff like forming an alliance with neighbouring countries, going to wars, and so on. Although the story doesn't have like a ''proper'' MC, this isekai anime is a solid 10/10 in terms of plot for me and it was a worthy to give it a shot

 

[ieatass69]

can't go wrong with youjo senki. re:zero if you haven't read/watched it, which I kinda doubt

 

[undeed]

non-harem is gonna be hard
for the requested criterias, my list would be

• the bookworm isekai
• the galactic isekai
• the putin isekai
• the queen's husband isekai

I would also throw this isekai (I don't have fancy name for it) for the "dark side"

for slow burn, not really amazing, but I re-read this child isekai multiple times (also waiting for the anime)
edit: let me also add this lost baby isekai

not isekai, but this elf fantasy is also good

I pick those because most have quite decent explanations of how things can happen
(and not just magically create something out of nothing everytime)

and that's it
anything else in my list would include harem or just fantasy (non-isekai)

 

[gorore]

barely anythings fits all your criteria so this is a list of good enough stuff, no loli and no harem things which don't overly sexualize women

little girl, shovel and the evil eye pretty good and fits all but I don't think its going to get continued for long since the LN got dropped at the point the manga is currently at
man isekaid into another world without skills isekaid after winning the lotery and deciding to run away from society, doesn't really dwelve into the "dark parts" of the world but its good and the mc isn't dumb
isekai munchkin guy gets isekaid by an evil goddess, steals her world book (kinda like a master playbook for d&d) and then sets off to try and find his sister who also got isekaid
going against god's will isekai (title too long and non specific) guy is getting isekaid as well as his guild members and a bunch of other people but figures out that their thoughts are being manipulated by god in the last second and changes his skills and goes alone (no dark parts of the world so far)
karate isekai guy gets isekaid when trying to stop a truck with karate, refuses the goddess' blessing and simply goes to hone his skills (no dark parts, might include some sexualisation)
karate survivor normal guy gets isekaid into a fairly harsh world and has to try his best to survive
My Instant Death Ability is So Overpowered, No One in This Other World Stands a Chance Against It class gets isekaid and almost everyone gets abilities and those who don't get left behind in the bus, mc is in this second group but he has an ability which isn't tied to this one (instant death), might have suggestive stuff and mc might be kinda dumb but its good enough to be recommended
my death flag's show no sign of ending typical otome game reincarnation into the bad guy with mc trying not to die but still attempting to fulfill the job of the bad guy to prevent the world from ending
Isekai Shikkaku 19th century mc is about to commit suicide with his lover when they get isekaid by truck-kun, technically harem but the mc just wants to die and is op in some kinda random ways. doesn't kill himself when he learns that his lover might also be in this other world and "goes on an adventure" with his summoner to try and find her, world is filled with other isekaid people who turned evil
speedrun isekai more on the comedy side, speed runner gets isekaid into a game and finishes it in record time but he bugs the world and decides to try to 100% it to reset it to a non-bugged state


not isekai
piece of shit hero mc is a cunt who only thinks about getting married to a rich woman and living off of her, his childhood friend is deemed the saint and then he becomes the hero after corrupting the holy sword
let this grieving soul retire same vibe as eminence in shadow except the mc isn't chunny and just misunderstood
unwanted undead adventurer guy dies but then becomes a skeleton, figures out that he can evolve by levelling up so he tries to become something humanlike again
why doesn't anyone remember my world in a world after a hero defeated all the enemies of humanity and sealed them the mc works as a soldier patrolling all the graveyards in case any monster escapes them, however the past somehow changes and he finds himself in the same world but with the hero having never existed and him being the only one that remembers his world (since you want interesting stuff putting this here even if it does go against some of your dislikes)


since you have kinda "strict" requirements just listed a few that I've read which have a fair amount of chapters, I consider to be good and meet "most" of them with some that are different
if the very brief description attracts your attention you can just open them and check if the first chapter is to your liking
hopefully at least one from this list will be something you haven't read and good enough
accidentally sent so editing a bunch of times

 

[DHMaster]

Isekai Munchkin, heavily inspired by Dungeons & Dragons and basically the D&D Movie as a manga but less subtle in how it handles the D&D elements. As such, there’s no “video game mechanics” here.

Yukito, the main character, is making logical choices given his circumstances.
He was sent into a world where you find out hard if you fuck around too much, and even more so for him, as such he makes sure he can reach his goal in the quickest and most efficient ways. (the “speedrun” in the english title was added by the Official TL and, as such, isn’t an actual part of the story)
The world is neither too dark nor bright, it does tend closer to the dark fantasy side though.

All the members of his party all have distinct and likable personalities and neither they nor Yukito show any interest in each other non-platonically.

 

[Rikireeks]

Though I can't account for good writing (and the darkside stuff) What you're describing sounds pretty much like the entire otome isekai genre.

Here are some of my top recs:
Who Made Me a Princess (the bread and butter of the genre)

Miss not so Sidekick
(Although you can't find the beginning chapters here. Also art takes getting used to)

Raeliana (A bit of the darkside to magic, but way later in the story. Missing chapters on this site. Also, DO NOT WATCH THE ANIME)

Yowaki MAX Reijou (Personal favorite)

Lvl 99
(does dip a little into hero/demon king territory, though it's not the forefront)

And then here's some stuff out of that genre that also fits your desc:
Murky Eyes
(This one actually fits your desc to a tee)

 

[CucarachaEnojada]

Isekai Killer.

After a Goddess made a bunch of people go to another wold,become heroes with cheat skills,and defeat the Demon Lord,they all become evil shits in secret,murdering people or some other stuff.

So,the Goddes,a sadist bitch btw,send a serial killer to that world,with the task of kiling those bastards.
I dont remember why,but MC got no cheat skill,aside from a notebook from the Goddes with personal information of the targets.

 

[slaystation]

non-harem is gonna be hard
for the requested criterias, my list would be

• the bookworm isekai
• the galactic isekai
• the putin isekai
• the queen's husband isekai

I would also throw this isekai (I don't have fancy name for it) for the "dark side"

for slow burn, not really amazing, but I re-read this child isekai multiple times (also waiting for the anime)
edit: let me also add this lost baby isekai

not isekai, but this elf fantasy is also good

I pick those because most have quite decent explanations of how things can happen
(and not just magically create something out of nothing everytime)

and that's it
anything else in my list would include harem or just fantasy (non-isekai)

I cannot thank you enough for the random "the galactic isekai" recommendation. It has quickly become my favorite "isekai" and may be one of my favorites of all time.

 

[sterven]

Mans looking for a unicorn