My recommendations are more in the horror/mystery genre since that's mainly what I read
Identical stranger is quite good! It's a small town mystery where the main character is the doppelganger of a guy that went missing prior to the story's beginning. Just a whole lot of drama and mystery.
(I mainly read it on webtoon since it's vertical scroll)
I've really been enjoying Raining Knives- it's also complete which is cool! The story is about a guy who kills his brother and gets haunted by him (and it's unclear whether it's him making it up or if it's actually happening- very psychological which I like)
Okay this comic is a bl- but do note it is the bully x bullied trope (which I know a ton of people aren't into) but idk, I felt this comic did a good job with it personally. The story has to do with two characters who are made to work on a class project together and end up accidentally developing powers- and this along with their history leads to a lot of drama. (also I adore the art)
I have other comics, but they're very dark and gloomy so I'm just not gonna include them here. I love me a f'd up psychological horror I mean concidering the comics I make thats unsurprising