I dunno, Up and Inside Out both came out after WALL-E and the former is easily my second favorite Pixar film of all time, with Inside Out not far behind.
As far as sequels go, I admit I enjoyed Cars 3 and Toy Story 3 (plus the shorts) a whole bunch, too.That being said though, WALL-E is easily my favorite Pixar film. I adore it to fucking death; it's a gorgeous movie, and a treat to watch every time. Part of me kinda wishes they leaned into the anti-consumer angle a bit more than it did though, as that part of the film seems to be forgotten/swept under the rug much more in favor of its environmentalism theme and the love story, which makes sense for the latter of course, as it's what's most important. It just seems like for many people, it completely went over their heads that "BNL weren't actually our friends and only cared for their own profit", especially for families who grew up with it.
Interestingly enough looking at concept art/model sheets/etc (pic related), plus the promotional in-universe BNL promos they made online, those all leaned wayyy harder into the anti-consumerist theme than the actual movie:
https://www.youtube.com/watch?v=t0HHrHafryc 
