While I generally have a
MDList for things I consider recommendable, in particular I really wish more people would experience the following works:
Zeikin de Katta Hon (The English titles on the page kinda ain't fitting, IMO): It's a great coming of Age story of a delinquent youth that finds his place among the library staff. It has pretty great characters and is pretty well-written.
SSS-Rank Suicide/Revival Hunter the title is very shit and honestly does this rather deep and honest story a disservice. The main character has "Return by Death" as his main ability and explores a tower, where he works hard on actually getting a good outcome, offering personal sacrifice and choosing the hard path instead of the easy route. Its DMCA'd here, so you hafta source it yourself.
World End Solte, though, this here is less this work specifically, but generally the works of
Mizukami Satoshi are absolute peak and it is a crime that their reading numbers are as low as they are. Holy hell.
Anyway, Saihate no Solte is a damn interesting story of a motley bunch of travelers, where the fairy has already been through the story once.
The Dragon, the Hero, and the Courier Gregorius Yamada is also a peak Mangaka and a colossal Middle Ages Geek. The main character of this work is a rather opinionated workaholic elf in a very medieval city, where fantasy/game elements have been thoroughly made eidetic and special jobs, like experience tracker being an actual profession. The author also has a section where he talks about worldbuilding decisions and interesting medieval history.
Good Night World the author is pretty good, but I can't actually explain what the story is about without heavy spoilers. I recommend finding a place to read
Sekai Oni, another of his works that Mangadex got DMCA's, as well. It contains quite an emotional rollercoaster.
Hero Union BBS An early comedy of the Isekai genre that is also quite an exploration of what it could've been. If SAO didn't fuck it up. It really plays around with the concept and also has many of the male heroes have a pointed opinion on Harem-Havers ("Kill the Harem Heroes, Kill them all" is part of a popular song).
The Pseudonym of Ryuuma a post-apocalypse where humanity has an enemy species, with the name ryuuma being carried by several people that come closer and closer to finally ending the threat.
I have more, but I post them in a future post, as it is time for to go to bed.
Can also support the recommendations for a lot of those already mentioned