As I found it impossible to make a top 10 list of 'madness and paranoia', I had to separated into two separate lists, one for each category. I'm not entirely happy because there are so many films that could make each list (or even both because the lines are sometimes blurred), but this will have to do.
MADNESS- One Flew Over the Cuckoo's Nest
- Black Swan
- Shutter Island
- The Shining
- Repulsion
- Apocalypse Now
- Black Narcissus
- Shock Corridor
- Spider
- Through a Glass Darkly
PARANOIA- Arlington Road
- Bug
- Invasion of the Body Snatchers (1956)
- Invasion of the Body Snatchers (1978)
- Enemy of the State
- Dark City
- The Conversation
- Blow Out
- The Thing
- The Tenant