I haven't read manga since a while but I'll help to answer the thread huehue
For psychological manga, I really really recommend:
LIFE
Battle Royale like this is one of the best manga I have ever read in my life, not suitable for fans who prioritize art beyond plot
Tokyo Ghoul and Tokyo Ghoul:Re
Funouhan
Attack on Titan
Some of Nakamura Asumiko manga that are not yaoi
Pupa, the anime sucks but i love the manga
For yaoi manga/doujin, I recommend:
All manga/doujin by Psyche Delico
Killing Stalking (this is a webtoon but yeah)
CUT
Mother's Spirit, a little bit bara
Bokura no Negai
Finder
Sagatte Omachi Kudasai
Doushitemo Furetakunai
All manga/doujin by Zaria
For an anti-mainstream manga, there is Uzumaki by Junji Ito. Everything made by this author is just beyond human's imagination.