Psycho is #1
The original Night of the Living Dead!!! 1968!
Agree that Psycho has to be the best ever.
At the time, killing off your leading lady in the first 30 minutes was unheard of. So much so that Hitchcock financed the movie himself. Period. Everything.
In the shower scene, the knife was never seen penetrating the victim. All the violence was completed in the mind of the viewer.
Easily one of the best movies ever, of any genre.
Psycho is the best; it had creepy scenes throughout the movie and music that chilled your bones at the proper times.
Bingo...Psycho!