LOL I'm not sure that I'd call Christian or Jewish leadership humble and pious. Most of those ancient Hebrew/Israelite leaders are basically warlords, with King David being an especially disgusting character. The Popes were pure human sewage, if we're counting them. And we only have an incomplete picture of what Jesus (who I do believe was a real person) and the Apostles were really like. Maybe if Jesus lived now he'd be feeding Kool-Aid to his followers in Guyana.
But, from the limited perspective I've got, Jesus does seem to have been a very different sort of person. Some prophets you read about, they could have been real, could have been crazy, but either way they seem benevolent and sincere. Jesus and the Buddha didn't seem to ever try to give themselves political power or riches. Muhammad and Smith did. Historical Jesus could have been the same crazy nutjob as all the "Jesuses" now, but have been a good person; I don't think a Smith could have been a good person.
Didn't think to mention it, but there's a perfect analogue for Joseph Smith in Hong Xiuquan, Taiping Rebellion, mid-1800s. Dude hangs out with missionaries, keeps trying and failing to pass his important exams. Has a mental breakdown, has visions, comes back as a prophet. Conquers half the country, but then gets too wrapped up in the pleasures of his harem and winds up losing. The prophet who goes to war to annihilate all Manchu subhumans and create the kingdom of heaven on Earth may have been lying if he just used his opportunity to fuck a bunch of women.