Sweet home
idk if u like yaoi, but this is the go-to for gory: http://www.mangago.zone/read-manga/killing_stalking/ you prob already read it bc its pretty popular but this checks off everything
Tales of the Unusual (plz read both on webtoon)
http://www.mangago.zone/read-manga/feeding_lamb/
I’ll not take responsibility for recommending this! and you can read his other work
Any of haradas works
I want some creepy, gory, and disturbing stuff plssss some horror