have you read monster?
I second monster, also:
https://www.mangago.zone/read-manga/himitsu/
https://www.mangago.zone/read-manga/double_noda_ayako/
https://www.mangago.zone/read-manga/hikaru_ga_shinda_natsu/
https://www.mangago.zone/read-manga/the_walking_cat_a_cats_eye_view_of_the_zombie_apocalypse/
https://www.mangago.zone/read-manga/devil_and_song/
https://www.mangago.zone/read-manga/sasaeng_obsessive_and_tenacious/
https://www.mangago.zone/read-manga/heartless/
https://www.mangago.zone/read-manga/jaa_kimi_no_kawari_ni_korosou_ka/
https://www.mangago.zone/read-manga/dolls_code/
https://www.mangago.zone/read-manga/tourou_no_ori/
https://www.mangago.zone/read-manga/the_red_world/
https://www.mangago.zone/read-manga/inu_yashiki/
https://www.mangago.zone/read-manga/emerging/
https://www.mangago.zone/read-manga/the_way_to_kill_you/
https://www.mangago.zone/read-manga/two_in_six_billion/
https://www.mangago.zone/read-manga/the_face_of_my_brother_that_only_i_know/ (not one shot, look it up on mrm)
https://www.mangago.zone/read-manga/kimi_to_uchuu_wo_aruku_tame_ni/
https://www.mangago.zone/read-manga/my_diamond_star/
https://www.mangago.zone/read-manga/stigmata_aikon/
https://www.mangago.zone/read-manga/children_miura_miu/
https://www.mangago.zone/read-manga/ajin/
https://www.mangago.zone/read-manga/pet/
https://www.mangago.zone/read-manga/an_uncomfortable_truth/
You did say "any genre"
These are all psychological, horror, mystery leaning except for like 3 which are more tragedy leaning
any recs from any genre? preferably psychological / horror (pls dont rec junji ito, I've read all of his work)