Here is an animator you may recognize as a certain horse riding a beach ball from Adventure Time, James Baxter!
James Baxter not only did work at Disney, but also at DreamWorks and later got to voice and animate two episodes of Adventure Time with James Baxter the Horse! Here are many examples of his amazing work and even check out his blog on @jbaxteranimator!
The Rescuers Down Under (1990)
Character Animator for Joanna
Beauty and the Beast (1991)
Supervising Animator for Belle
The Lion King (1994)
Supervising Animator for Rafiki
The Hunchback of Notre Dame (1996)
Character Designer / Supervising Animator for Quasimodo
The Prince of Egypt (1998)
Animator for Moses
The Road to El Dorado (2000)
Senior Supervising Animator for Tulio & Animator for Chel
“Oh, Moses, I shall be with you when you go to the king of Egypt. But Pharaoh will not listen. So I will stretch out my hand and smite Egypt with all my wonders! Take the staff in your hand, Moses. With it, you shall do my wonders. I will be with you, Moses.” The Prince Of Egypt, Dreamworks, 1998.