Here's an amazing nine-minute compilation of "100 Masters of Short Animation." It's probably most useful as a reminder of all the different things that animation can be in terms of technique and style and approach.
I won't pretend to understand the selections and exclusions. Willis O'Brien is in there but not Ray Harryhausen. Dave Fleischer and Walt Disney are in there but not Max Fleischer. Many Disney animators are in there but I think only one (Wolfgang Reitherman) of the legendary Nine Old Men…and so on. In some cases, the named person is the person who animated what you're watching. In some cases, it's the person who directed what you're watching. And in some cases, it's the person who hired the person or persons who directed and/or animated what you're watching.
But now that I've put those thoughts into your head, don't think of that. Just enjoy a reminder of the endless possibilities in animation…