Subspecies
Camp Blood
Sleepaway Camp
American Guinea Pig
Beaver Lake Zombies
Psycho
Porkchop
Silent Night Deadly Night

Re-Animator
Phantasm
Paranormal Activity
Cabin Fever
Prom Night
Basket Case
Candyman
Critters
Leprechaun

*Will be adding more as i remember :

Children of the Corn
Cube
The Hills have Eyes
House

Blind Dead

28 Days Later
AVP
Black Christmas
Blacula
Blair Witch
Dark Shadows
Devil's Rejects
Exorcist
Hammer Dracula
Hammer Frankenstein
Hatchet
Malevolence/Bereavement
Maniac Cop
My Bloody Valentine
Night of the Demons
The Omen
Predator
Return of the Living Dead
Rocky Horror
Romero's Dead
Slumber Party Massacre
The Purge
The Thing
The Town that Dreaded Sundown
Universal Monsters
Wolf Creek

Ring/Ringu

Cold Prey
the Hannibal Lector films*
Vengence Trilogy*
Boggy Creeks
Shark Attack

*if ya count em as horror

Hannibal Lecter films definitely qualify as psychological horror in my book.

Ginger snaps

Wishmaster

Pumpkinhead

Tetsuo

Whispering Corridors
The Grudge/Ju-On

Carnosaur
Carrie
Henry: Portrait of a Serial Killer
Laid to Rest
Offspring / The Woman
Poltergeist
Scanners
[Rec]
Silent Hill
Argento's The Three Mothers

More:

Alligator
An American Werewolf in London / Paris
Blood Feast
Creepshow
The Fly
Dr. Phibes
Gremlins
The Howling
The Human Centipede
It's Alive
Jack Frost
Jeepers Creepers
The Lost Boys
Pet Sematary
Piranha
Sharknado
Species
Village / Children of the Damned
Willard / Ben
Witchboard

Universal:
Frankenstein
Dracula
The Wolfman
The Creature From the Black Lagoon
The Mummy
The Invisible Man

Hammer:
Dracula
Frankenstein

Child's Play / Chucky
King Kong
Underworld
Jeepers Creepers
Godzilla
Gamera
Kolchak: the Night Stalker (2 made-for-tv movies, a series and an attempted reboot series and a bunch of books and comic books)


Marginally Horror:
Planet of the Apes
Harry Potter
Twilight

Piranha