Holyland one of the unsung GOOOOAAAAATTTTS.
I'ma rep you for even mentioning it, cause I swear it seemed like I was the only one here that read it.
It's actually one of those stories that I feel should be required reading once a certain personality type hits a certain age.
edit: and while Gosu may be good, in my opinion, its a tier below everything you just mentioned.
I just found it searching under the martial arts + seinen tag of my favorite online readers.
Real talk, I didn't even want to start at first cuz the art seemed kinda weird to me.
And that first chapter had a real old school vibe...like action/thriller movies from the 90s. Which could go either way if you're old enough to remember.
But maaayne when that action started
It had that emotional appeal: a soft, sensitive nerd constantly getting his food ate by thugs
Then just like a nerd, reads a book about fighting and fantasizes about protecting himself/fighting back
But unlike a nerd, actually practices the technique he read about religiously until he perfects that ONE move
Then after a year of this crazy self-training, some random street nikka tries to pull up on blood
and gets his shyt
wrecked off that one technique
And so the story of the Thug-Hunter begins
PLUS the author studied all the fighting styles he put in there, so even though it's sloppy-ass streetfighting, every fight had a technical breakdown making you believe you could just hop out in the streets whooping ass with the knowledge he dropped.
It doesn't get the recognition it deserves