Out of the list i would probably choose Hellraiser.
Exorcist has some real freaky moments, especially the girls face.

Shining and the Omen are great films but are not one bit scary.

Evil dead is more comedy factor.

Chainsaw Massacre, isnt scary, but has that great scene when he grabs the girl and places her on the meathook.



American Warewolf In London, has some real scare moments, especially at the start of the movie when they are on the moors, and when he has those freaky flashbacks throughout the film, and also where that man is stalked to his death on the london underground.

Poltergeist has the chilling clown scene,

Saw, is quality and has some really great moments as well, when i watched it first really freaked me out!

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Gremlins is the scariest movie ever made. I still don't walk close to Christmas trees.

somewhere between nightmare on elm street and poltergeist. imo, the latter made my entire generation uneven with clowns.