There's other justices in this world besides the law
I enjoy the masterpiece from the master of suspense Alfred Hitchcock, Psycho. I also enjoy his North by Northwest and Vertigo.
But there is one movie that I'm particularly fond of. It is a little known 1981 made for TV movie called "Dark Night of the Scarecrow". It stars Charles Durning, Lane Smith, Larry Drake and Jocelyn Brando, yes Marlon's sister.
It follows a group of vigilantes that menace a mentally retarded man because of his relationship with a little girl and the events thereafter. It is much more a psychological thriller than a blood and gore fest, but it is one of the greatest movies I've ever seen. What's more, it is lauded as just creepy enough that most people can't believe it was a made-for-TV movie.
I encourage you, if you can find it, to check it out and see for yourself.
Another I just thought of because I'm watching it now on AMC is the original Poltergeist, with Jo Beth Williams and Craig T. Nelson. If you are creeped out by clowns, you may not enjoy this one, but I believe this movie is vastly underrated as far as horror flicks go.
Barbershopman