1. Leatherface (from The Texas Chainsaw Massacre, 1974)
He’s a brutal murderer, a depraved cannibal, and a lunatic long since past the point of any sort of redemption. And that’s all pretty scary. But it’s the flat, matter-of-fact way in which this hulking monster carries out his work. He sees his victims as livestock, treats them as such, and cannot be reasoned with in any way. For my money, Leatherface is the purest cinematic distillation of sudden, random, unspeakable terror -- and he also wears a super-gross mask that, well, let’s just say it’s not made of leather.