Up, Toy Story 2, Monsters, Inc., Toy Story, Kung Fu Panda, Wall-E, The Incredibles, Finding Nemo...in no particular order.
Pixar is better. Much better. But the claim that Dreamworks just tries to get big name actors doesn't make sense, because Pixar has had many all-star casts. Toy Story for example. Tom Hanks, arguably the biggest movie star ever, and Tim Allen. They've also had Willem Dafoe, Kevin Spacey, Owen Wilson, George Carlin, Paul Newman, John Goodman, Billy Crystal, Samuel L. Jackson...and more.