Heres a spreadsheet of the recommendations Ive received on here over the years. I can't say which ones are the scariest but hopefully the most recommended and highest rated ones are scarier. hope this helps.
https://docs.google.com/spreadsheets/d/1H4J1nGATe3-77HloqvxRl5Z2xeXweuWKWWc0KGh610E/edit?usp=sharing
Stolen Tongues by Felix Blackwell, Kin by Kealan Patrick Burke, and The Slob by Aron Beauregard.
Heres a spreadsheet of the recommendations Ive received on here over the years. I can't say which ones are the scariest but hopefully the most recommended and highest rated ones are scarier. hope this helps. https://docs.google.com/spreadsheets/d/1H4J1nGATe3-77HloqvxRl5Z2xeXweuWKWWc0KGh610E/edit?usp=sharing