I think my favorite comedy films would be
Monty Python & The Holy Grail: this movie is hilarious. It can be uneven at times (the Sir Gallahad scene was awful and the "not supposed to leave the room" scene starts out funny and then goes way too long) but this film has enough hilarious moments (Sir Robin, Knights Who Say Ni, Sir Lancelot Wedding, Evil Rabbit) to make it one of my favorite Comedies. I will warn you however, that this film should never be shown to anyone who has had a history of seizures. If you haven't seen the movie, there is a scene during the opening credits with flashing bright lights in it that goes for somewhere around 15 seconds.
Airplane!: this movie is consistently funny all the way through, with a lot of subtle jokes and some great not-so-subtle jokes as well.
The Naked Gun: Very similar to Airplane! but it does lean towards slapstick and physical comedy more often than Airplane!. This one is just as good in my opinion.
Office Space: a lot of great dry humor. This one isn't for everyone but if you like drier, more subtle humor this one is great. It does have a few scenes that are less dry but most of its humor is satirical, focused around the mundane, uninspiring office environment.
The movies listed above are very regularly regarded as some of the best comedies of all time by critics and audiences. These next few may be a little more controversial.
Daddy Day Care: This film did not perform well critically but I think it is a amazing, underrated comedy. Eddie Murphy is great in this film. He simultaneously acts as the straight man to the kids and also has a lot of great comedic moments of his own. The film would fail under a worse script and without Eddie Murphy's sense of comedic timing, but it works very well. The film has a lot of great physical comedy, and some amazing scenes.
Overboard (Original version): No I am not talking about the remake. I am talking about the original. This film has a different tone compared to the others mentioned so far, but I really like it. It feels very warm and lighthearted, and it's comedy comes from the characters themselves. Despite this the film does a good job of creating likeable characters and actually tries to tell a good story. The main characters both start as bad people but soon grow to love eachother and become better people. The film's comedy doesn't always work, but most of it does and it comes very naturally from character interactions. The humor in this film isn't situational. It is character-driven, and I really like it for that. It feels different to many comedy films in this aspect.
Napoleon Dynamite: this film has a lot of very odd and surreal humor, some dry humor and not a whole lot of slapstick. I love this film's unique tone, and while i know many dislike it, I personally think this film is hilarious.
And now, my favorite comedy film of all time:
Between Two Ferns: The Movie: this one many of you may have never heard of, but it is on Netflix and it is HILARIOUS. Every scene in this film is filled with humor. Every kind of humor is here: subtle dry humor, pop culture references, character-driven humor, raunchy humor, and even some slapstick comedy. This film has it all and no scenes ever drag on at all. This is not only my favorite comedy film of all time but one of my all-time favorite movies of all time.
