The two movies that scared me were The Exorcist and Black Sabbath.
The latter was by Mario Bava and contained three seperate stories: The Drop Of Water, The Telephone & The Wurdalak ( which starred Boris Karloff in this story).
The first story (The Drop of Water) was the story of a nurse who steals a ring from a dead spiritualist only to be haunted by the corpse. It frightened me!
This was one trilogy that gave your hostess to the supernatural here (Countess Marya) a chill!
Marya