Candidate #2: VOLUNTEERS
Pros: There was a time when Tom Hanks wasn't arrogant except in character. Plus he actually married Rita Wilson, and they haven't gotten divorced! This movie also features John Candy in a brilliant supporting role. Steals from the following classic movies with knowing nods: Casablanca, Bridge Over the River Kwai, and Lawrence of Arabia. Star Wars geek note: the actress who plays Lucille (Rucirre) is named Shakti.
Favorite Quote: "In two weeks, I'll have this place looking like Pittsburgh."
Cons: More racial humor than necessary, even for a 60's piece. No frontal nudity. Poor pacing and a voice over denouement.
Is this the funniest movie ever? No. But it is funny. Probably funnier than you would give it credit for even.