Two animators' names you should definitely know from Warner Bros. classic cartoons are Chuck Jones and Tex Avery (and Bob Clampett and Bob McKimson but we'll focus on Tex)
Tex pretty much established Bugs Bunny ("What's up, Doc ?" is his line, so the legend goes) and had a heavy influence on developing the fluid style that made Warner Bros. famous. he later went to MGM and you can definitely see a style that has been emulated by many other animators.
His gags are classic (lots of kissing) ... along with 1940's standards like female objectification.
A Wild Hare (1940)
(What I like to call 'Cro-Magnon Bugs')
Little Hot Riding Hood (1943)
Here's a bio of Tex
Here are 3 of Tex's model sheets. The silhouette of these characters and the flowing gesture of their design are great.
