My ranking of the ones I have seen:
1. The Bird with the Crystal Plumage (1970)
2. Tenebre (1982)
3. Phenomena (1985)
4. The Cat o' Nine Tails (1971)
5. Suspiria (1977)
6. Deep Red (1975)
7. The Stendhal Syndrome (1996)
8. Inferno (1980)
9. Dark Glasses (2022)
10. Do You Like Hitchcock? (2005)
1. Tenebre (1982)
2. Suspiria (1977)
3. Phenomena (1985)
4. Opera (1987)
5. The Bird with the Crystal Plumage (1970)
6. Inferno (1980)
7. Deep Red (1975)
8. Four Flies on Grey Velvet (1971)
9. The Stendhal Syndrome (1996)
10. The Cat o'Nine Tails (1971)
11. Jenifer (2005) - from the tv show Masters of Horror.
12. Trauma (1993)
13. Sleepless (2001)
14. Pelts (2006) - from the tv show Masters of Horror.
15. Black Glasses (2022)
16. Mother of Tears (2007)
17. Two Evil Eyes (1990)
18. Dracula 3D (2012)