SlenderMan: Freddy Krueger

Offender: Pyramid Head

Splendor: Pinhead

Laughing Jack: Pennywise The Dancing Clown

Eyeless Jack: LeatherFace

Kagekao: Hannibal Lecter

Doll Maker: Chucky

Ben Drowned: Jason Voorhees

Hoodie: Norman Bates

Toby: Jack Torrance

Masky: Ghostface

JTTM: Jeepers Creepers

JTK: Isaac (If you don't know who he is. He's a kid from the movie Children Of The Corn)

Homicidal Liu: John Kramer AKA Jigsaw