T4R
Toy Story 1-3 were amazing, Up was fantastic, How to Train Your Dragon was awesome, and I don't know if Dinosaur (2000) counts as animated, but it was quite good as well. Oh, and I can't believe I forgot this, but The Land Before Time.
But Wall-E was perfect.
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I think The Lion King is one of the obvious movies, along with Monsters Inc. and just about any Disney Christmas classic.