Looks like six to me...
But anyway- You've actually got a really nice little collection there, very diverse. It's obvious you will give plenty of subgenres and styles a try. So here's a little list that you could start with:
- Halloween
- Cat People (1942)
- The Serpent and the Rainbow
- House on Haunted Hill (1959)
- Hellraiser
- Bat Taste
- Jacob's Ladder
Try some of those.