I never understood why (in Western culture) adults are expected to dislike animated movies and be ashamed if they did. I've always loved animated movies and still do and always will.
I love most Disney and Pixar movies from the 90s Renaissance onward. There's plenty more than the ones already named, including my favorites (Mulan, Moana, Finding Nemo), and you can find them all on Disney+. Aladdin, Tarzan, Pocahontas, Brother Bear (another of my alltime absolute favorites, but be warned!), Atlantis, Treasure Planet, ... kinda surprised Lion King hasn't been mentioned yet when the theme preferably is "animals". It's one of the few Disney movies that actually got a pretty decent sequel, too. Emperor's Groove.
Non-Disney: Spirit. Legend of the Guardians. Road to El Dorado. Ice Age. The Madagascar movies are kinda fun. So are the Despicable me/Minion movies.
One of my favorite movies has always been The Last Unicorn, but that doesn't exactly qualify as more-feel-good-than-not. Ditto the Swan Princess. Do *not* get tempted to watch Ferngully, either.
Anastasia might be a fit, not 1000% sure.
Over the Hedge
Kungfu Panda
How to train a Dragon
Coraline was top-notch. (also a big fan of Corpse Bride over here).
Edit:
Forgot one: FANTASIA!!!
Edit2:
Ratatouille also was kinda cute.
Kiki's Delivery Service.
Edit3:
There was a super cute anime on Netflix a while ago, not sure if it's still on there: A Whisker Away
(though, while super cute and not really dark, it is a bit on the heavier side, so be warned)
I also go through phases of rewatching Sailor Moon :) That's gonna be high on my just-feel-good-list for forever.