Alan Groening's Animation Mountain, submitted by me. Alan Groening is quite possibly this generation's most overlooked artistic talent. What makes him stand apart from everyone else in his field is his versatility. He can create a masterpiece in any format, from animated gifs:
To 3D models on par with Pixar's best work:
To hilarious works of sequential art:
Heck, even the design of the website itself should probably be studied for years to come. They say an artist is never appreciated until he's dead, and I hope this man lives forever.