Rough Guide to Horror II
Here is a link to the official canon from the book Rough Guide to Horror.
The ones listed here are also mentioned throughout the book. Please let me know if you have seen them all. ;)
Missing at first glance:
Le moine (The Monk), 1972
Yin yang lu (Troublesome Night), 1997
La campana del infierno (The Bell of Hell), 1973