Our pal Jerry Beck is attempting the impossible: To winnow the list of great Warner Brothers cartoons down to a "One Hundred Best" list for a forthcoming book. Go over there and give him a hand.
And try to help him with the lower half. So far, most of the commenters are listing the obvious choices: One Froggy Evening, The Great Piggy Bank Robbery, Duck Amuck, What's Opera Doc?, Duck Dodgers in the 24½th Century, Rabbit Fire, Coal Black & De Sebben Dwarfs, Rabbit of Seville, Three Little Bops, etc. There's very little chance of any of them not making the list. I'm sure Jerry would appreciate some nominations of cartoons that aren't always seen.