There is no film funnier than Monty Python and the Holy Grail, some others that stand out are Groundhog Day, Human Traffic, National Lampoons Animal House and most of the Carry On series
My favourite comedy movies are: "Some Like It Hot" by Billy Wilder, "The Firemen's Ball" by Milos Forman and Polish cult comedy "The Cruise" by Marek Piwowski.
Monty Python's Holy Grail Galaxy Quest Sixteen Candles Animal House Dumb and Dumber Young Frankenstein
I really like comedies in mockumentary format, like THIS IS SPINAL TAP, FOR YOUR CONSIDERATINON and BEST IN SHOW. The movie OLD SCHOOL by Will Ferrel made me laugh my guts out! I find really funny hollywood movies in this site. wander inside the site and you might get a chance to score an acting gig in an ongoing comedy movie shoot for real!
I'm calling these two now Best Date movie of 2008 SEX AND DEATH 101: https://www.youtube.com/watch?v=EF3Km-dcBjc if you don't get laid after this you suck Funniest movie of 2008 THE GRAND https://www.youtube.com/watch?v=J_lChWgiK-s ASSEMBLE BABY both of those are only if Judd Apatow doesn't release a film
No one mentioned any Silent films... The General by Buster Keaton Big Business by Laurel and Hardy The Music Box by Laurel and Hardy Modern Times by Charlie Chaplin Duck Soup By The Marx Brothers Steamboat Bill Jr. by Buster Keaton (contains on of the most dangerous stunts in film history) OK two on the list is Sound, another sound film is "We're No Angles" with Humphrey Bogart
the music box has to be some of the funniest ever put on film...classic laurel and hardy....the keystone kops were pretty good too.
The Keystone Cops were good in their own way, sort of the inspiration or forerunner for the Three Stooges. Amazing no one was killed during the filming. Heard Mack Sennate also tried something along the lines of the Keystone Cops only for Firemen. Wasn't too successful. Slapstick of that sort ran its course.