if u want yaoi i have one but it is adopted bro trope are u ok then try this https://www.mangago.me/read-manga/the_eternal_circumstances/
Idk if all of these counts because some of these lean more towards psychopath rather than yandere but these are my recommendations
https://www.mangago.me/read-manga/unchanged_man/
https://www.mangago.me/read-manga/obscene_lnvasion/
https://www.mangago.me/read-manga/koisuru_psycho_no_shirayuki_kun/

pls i dont care if its yaoi/yuri/straight just want some angsty weirdo freak yanderes like ones that wohld kill/kill for their lover