Life of Brian Oh Brother where art thou Freebie and the Bean The Big Labowskie Kelly's Heroes Airplane The Holy Grail Duck Soup Something about Mary The Mask Blazing saddles Support your local Sheriff Kingpin
Not familiar with some of these but after googling the second was disappointed to see that it did not feature Derek Nimmo.
Duck Soup is a work of genius. Most will point to the mirror scene as iconic, but the scene where the two brothers sneak into the house and one of them thinks he's unlocking a safe, except it's a radio and he turns it on full blast, is funny as fck! I appreciate I've now spoiled it for everyone who hasn't seen it, but tbf if you haven't seen it by now it's the least you deserve ya fckin heathen. HTH
The Three Amigos Silence Of The Lambs Mean Streets Mr Blobby's Love Pump Shenanigans The Godfather Priceless comedies for all the family
Can't believe non of you has mentioned Bubble Boy. Apart from that most of my faves have been mentioned.