Vulture doesn't include Wall-E in its list as it ranks Pixar's eight other films. The bottom of the bunch, not surprisingly, is Cars. No. 1 is a bit of a surprise. For what it's worth, here's my ranking (including Wall-E) with links to my reviews where possible ...
9. Cars
8. The Incredibles
7. Ratatouille
6. A Bug's Life
5. Monsters, Inc.
4. Toy Story 2
3. Wall-E
2. Finding Nemo
1. Toy Story
My review of Wall-E will be up at The Simon tomorrow.