Some films I can think of:
- Sympathy for Mr Vengeance (for me far more brutal than Oldboy)
- Come and See (after watching this you would learn the harrowing nightmare of life during wartime)
- Pink Flamingos (though I admit I enjoy rewatching it because it's just hilarious once you got over the blatant filth and shock factor, but I'm sure for some...... reply
