Please give me recommendations of completed manga

[Lagiator]

Unlike ongoing title, completed manga didn't appear anymore on updates page.
I wonder how many title slip our grasp when it's past its serialization.
I've tried to browse completed tags, but it's too many to look at and still hit or miss.
Give me some title you've read to the end that you think it's a 'masterpiece'.
Bonus point if it's not that well known or at least gaining popularity it deserve.
Huge respect for a title that give satisfying end when it supposed to, instead of prolonging the serialization.
ex: Mizukami Satoshi one, two, three
Moriyama Daisuke one, two
Monster Collection, Vigilantes, Shut hell

 

[undeed]

(not apdated for over a month)
so then, without any specific taste, criteria, or preferences, any recommendation will still be a hit or miss.

 

[Lagiator]

(not apdated for over a month)
so then, without any specific taste, criteria, or preferences, any recommendation will still be a hit or miss.

Well of course, any recommendation will still be a hit or miss in the end. People have different taste after all, what i consider a masterpiece might be a trash to you, and vice versa. but I'm willing to try if you're willing to share.
I get hyped up when my friends recommend me some manga he said the mc is the most badass hero or have peak ending.
I don't give specific criteria because even in genre i usually never touch like BL, i still got rec like Prunus Girl which i actually liked.

 

[GipoScribantino]

This one and this one.

 

[Hicleric]

I'm going to recommend anything by Sahara Mizu/Yumeka Sumomo. I'll admit haven't read her yaoi stuff but I'm sure it's as good as the rest definitely getting to it any day now.

And most of it is still readable here!