There are many remarkable leaders throughout history and around the world who have done the best that they could for the people they found themselves leading lead and did so for noble reasons and not because they felt like they were better than them.
Tecumseh, Malcolm X, Angela Merkel, Cincinnatus, Eisenhower, and Gandhi all come to mind.
George Washington was surely an exceptional leader but he isn't the only one.
I don't know much about your examples, but did any of them turn down an offer of great power?