A horror or survival theme will be also good(￣∇￣")
Try Fog Land its peak
and also Omniscient Reader's Viewpoint
https://www.mangago.me/read-manga/ajin/
It a master peice you will love it
I second Ajin, it's really well written
Yaaaヾ(☆▽☆) bro, it's has one of the best villian character , for me
Ballad of hero
Idk if this is the type of manhwa you'd want but the ART IS SOO FUCKING GOOD AND ITS SO FUCKING FUNNY. And it gets funnier if you read the novel, which i am. Ah, but it's fairly newish, but its fucking funny and its art is so good that it makes up for it.
https://www.mangago.me/read-manga/master_swordsman_s_stream/
(づ￣ ³￣)づ