The Thing,Friday The 13th,The Exorcist,Alien, Halloween,Scream,The Evil Dead
Hellraiser is my personal favorite.
Bruce Campbell vs the army of darkness.
Some films that haven’t been mentioned yet:
The Birds (1963)
Raw (2016)
Martyrs (2008)
The Descent (2005)
28 Days Later (2002)
Hereditary (2018)
The Last Exorcism (2010)
Creep (2014)
Hostel (2005)
The Fly (1986)