Dario Argento - purely based on my memory. Haven't seen any of his films in years.
1. Inferno (1980)
2. Deep Red (1975)
3. Mother of Tears (2007)
4. Sleepless (2001)
5. The Bird with the Crystal Plumage (1970)
6. Tenebre (1982)
7. The Stendhal Syndrome (1996)
8. Dracula 3D (2012)
9. Trauma (1993)
10. Opera (1987)
11. Suspiria (1977)
12. The Cat o' Nine Tails (1971)
13. Phenomena (1985)
14. Two Evil Eyes -The Black Cat (1990)
15. Four Flies on Grey Velvet (1971)
16. Giallo (2009)
17. The Phantom of the Opera (1998)
18. The Card Player (2004)
Never watched:
The Tram (1973)
The Eyewitness (1973)
Five Days in Milan (1973)
Do You Like Hitchcock? (2005)
Jenifer (2005)
Pelts (2006)