The author is not a believer in The Devil or possession.
And, as an added bonus for those new to the genre, here’s a few more essentials that didn’t make the cut which you should definitely seek out: Faust, Bride of Frankenstein, Creature from the Black Lagoon, The Horror of Dracula, Black Sunday, Psycho, Peeping Tom, Carnival of Souls, Texas Chainsaw Massacre, Carrie, Dawn of the Dead, Halloween, Alien, Phantasm, The Fog, Friday the 13th, The Howling, A Nightmare on Elm Street, The Fly, The Hitcher, Evil Dead 2, Misery, The Silence of the Lambs, Dead Alive, Bram Stoker’s Dracula, Candyman, Funny Games, The Devil’s Backbone, Hard Candy, The Orphanage, The Mist, Only Lovers Left Alive, The Babadook, It Follows.
Hopefully this list of best horror movies will either encourage you to seek out some of these films or think of others that belong on here as well.