>What work of Disney (company, not the man per se...) is more influential on the modern American Psyche (today, in 2026) than Ironman, X-Men or Spiderman?

All of them. None of those MCU movies really did anything to the "american psyche", forgettable entertainment.

And even if they had done, the question was "in terms of how Americans see themselves and how people around the world sees us". Nobody sees Americans in in 2026 the way Stan Lee or MCU saw them. Not even themselves. How they have been seen in general wasn't determined in 2026 or 2020 or 2000, but in the 20th century. And even how they're seen and see themselves in 2026 is not defined by the MCU either.

Concerning the general view on US, Disney movies (especially including Pixar) have had much more influence. But I mentioned other even more important things: Hollywood in general (pre-MCU, from early film to John Ford, and to Copolla and Scorsese), the western and the idea of the west/'frontier', rock n' roll...

>Sleeping Beauty? That's French. Beauty and the Beast? Also French. Great Mouse Detective? British. Alice in Wonderland? British. Pinocchio? Italian.

In their Disney treatment they're 100% American.