Same! Try these
https://www.mangago.zone/read-manga/kuzu_no_honkai/ (Anime: Scum’s Wish)
https://www.mangago.zone/read-manga/youko_x_boku_ss/
https://www.mangago.zone/read-manga/fruits_basket/
https://www.mangago.zone/read-manga/bronze/
https://www.mangago.zone/read-manga/watari_kun_no_xx_ga_houkai_sunzen/
https://www.mangago.zone/read-manga/you_re_my_loveprize_in_viewfinder/ (Anime: Viewfinder)
https://www.mangago.zone/read-manga/ookami_shoujo_to_kuro_ouji/ (Anime: Wolf Girl Black Prince)
https://www.mangago.zone/read-manga/red_fox/
https://www.mangago.zone/read-manga/kaikan_phrase/
https://www.mangago.zone/read-manga/vampire_knight/
https://www.mangago.zone/read-manga/brothers_conflict/ (The manga is the adaptation and mostly side stories for fan service, but the anime is good)
https://www.mangago.zone/read-manga/diabolik_lovers_anthology/ (Has an anime and otome game)
https://www.mangago.zone/read-manga/kamisama_hajimemashita/
https://www.mangago.zone/read-manga/school_days/
Yeah, it’s definitely a hard watch. There is also this Seinen one that I liked that had a bit of GANTZ and Deathnote/Tokyo Ghoul vibes but less extreme and it had both an anime and manga, I cannot remember which one it was as it’s been a while but you might like all 3 regardless.
Togainu no Chi
Dogs: Bullets & Carnage
Bungo Stray Dogs

As of late, I've been addicted to the yandere character trope. So much so that I've been scouring the internet for any anime with yandere, like Future Diary and Happy Sugar Life, but it's not enough; I need more. Which is why Im asking if anyone can list some manga/anime they think would match the two I've mentioned, or even something along the same vein, that would be amazing.