Akira is the easy answer. It inspired filmmakers worldwide and continues to be referenced to this day.
But expanding beyond Akira, Castle in the Sky and Princess Mononoke are really up there for me, if we’re talking anime. For western animation, Aladdin is my favorite Disney film, and Secret of Nimh my favorite from Don Bluth.
For 3D animation, The Incredibles. No contest. Amazing writing, perfect pacing, and visually stands the test of time.
Howl's Moving Castle.
Batman voicing the main character, a talking fire, walking castle and a turnip scarecrow. What more do you want?
Eh…. it suffers from the same problem several Marvel movies have, it just does a bunch of stuff in the third act that feels like the writers had no idea how to wrap things up so you have a bunch of stuff happening at a ridiculously rushed and confusing pace. Great film up until then.