Dr Strangelove
Dead Men Don't Wear Plaid
This Is Spinal Tap
Best in Show
Waiting for Guffman
Muppets Take Manhattan
Princess Bride
Life of Brian & aforementioned Python
Ditto Marx Bros, especially Duck Soup
Philadelphia Story
Bringing Up Baby
Some Like it Hot
Ghostbusters (but only the original)
A Christmas Story
Catch 22
Harold and Maude
Tootsie
Love and Death
Annie Hall
Animal House
Blazing Saddles, Young Frankenstein
Fargo
Raising Arizona
Blues Brothers
Pee Wees Big Adventure
Cradle Will Rock
Airplane
The Big Bus
Stripes
Kentucky Fried Movie
Earth Girls Are Easy
MASH
Being There
Great Dictator
Moonstruck
Harold & Maude
My Little Chickadee
The Ritz
Manhattan
Cat Ballou
Beverly Hills Cop
Dinner at Eight
Beetlejuice & every damn thing Burton ever made
The Jerk
The Birdcage

Actually, I could on and on...the above are just my fave (mostly) American comedy film list...then there is

Waking Ned Devine
The Snapper
Brazil
Local Hero
Full Monty
The Commitments
Little Voice
Bend it Like Beckham
Billy Elliot
Love Actually
War of the Buttons
Agnes Brown
Amelie
Il Postino
Everybody's Famous

Like I said, I could on...