There are so many, I can't narrow them down to just one batch. So here is the first in (at least) two parts!
#1 and #2-3/4 - Airplane! and The Naked Gun: From the Files of Police Squad! (#1 - 3) - I'm combining these movies because the video I found does the same. In truth, Airplane! is at the top of the heap, and the Naked Gun series slots in slightly down the list. But I defy you to get any of these four movies, and not laugh. It's my litmus test for a sense of humor.
#3 - What's Up, Doc? - One of the funniest movies of the 70s starred (at their physical peaks) Ryan O'Neal and Barbra Streisand, not to mention Madeline Kahn in her introductory role, Kenneth Mars, John Hillerman, Phyllis Albertson, Sorrell Brooke and Randy Quaid. It's a comic masterpiece, and if you don't think so, well. . .there's no hope for you. Represented here by one of the few embeddable videos I could find, a blooper reel.
#4 - Top Secret! - From the wonderful ZAZ! team (before David Zucker lost his ever-loving mind) was this under appreciated comic masterpiece, starring Val Kilmer at his absolute best. Not to be missed.
#5 - Ruthless People - Again, ZAZ! in one of their more straight-ahead comedies, produced this gem, starring Danny Devito and Bette Midler. It's one of the funniest movies of the 80s.
#6 - Young Frankenstein - Surely one of the most artistic and well-executed spoof movies of all time, Young Frankenstein marks the pinnacle (along with Blazing Saddles) of both Mel Brooks' and Gene Wilders' careers. Nothing short of perfection. Frau Blucher!!!
#7 - Blazing Saddles - Of course, with the last entry, I couldn't forget this one. Not only is this a spectacular spoof, an fantastic skewering of racism, and a masterful bit of film making. . .it's also a pop culture touchstone for its generation. Along with Young Frankenstein, this movie is so full of talent, so jam-packed with jokes and one-liners, the two films may have more quotable lines than any ten other movies.