...so many and it would be hard to choose one because different genres as well...a few would be..
(I love Angus, Thongs and Perfect Snogging btw...one of my favourite feel good movies..
..)
The Third Man
The 39 Steps
Lock, Stock and Whatsit and Snatch
...ahhhh, Gregory's Girl..
..
Four Weddings and a Funeral
Shaun of the Dead
A Fish Called Wanda
The Full Monty
anything Wallace and Grommit merchandised and related...
Monty Python Life of Brian