I was listening to a podcast about Alexander the Great on my walk yesterday and with him, you see very much what I think happened to Jesus.
There is absolutely no doubt that Alexander III of Macedon was a real king who accomplished some amazing things in a very short life, dying at 32 after taking down what had been the most powerful empire in the world for a couple centuries in a stunningly fast and brutal campaign.
But then all kinds of stories started to accrue to that core history.
The story of Alexander cutting the Gordian knot, for instance. The story was that a prophecy foretold that the man who cut the Gordian knot would rule the world. Alexander cheated and cut it apart with his sword. There's just no evidence for the story and it sounds like more of a justification of Alexanders subsequent career than a real story.
Or the even more problematic story that the podcast was talking about, in which the Queen of the Amazons (a mythological nation of women) came to Alexander seeking to bear his child. Apparently they, um, went at it in the sack for 13 days (presumably with breaks for munchies). And then she left, promising that if she had a boy, she would send him to join his father but a girl would remain with her to be raised as an Amazon. The story stops there so we don't know if the 13-day sexfest even got her pregnant, let alone the sex of the child. The big problem with the whole thing being that the Amazons were a myth to start with. Again, this seems to be a way of puffing up Alexander by both having an important mythological queen seeking him as a baby daddy and also the fact that he was able to have 13 days of apparently continuous nookie with her.
So why could Jesus not be the same? No, I don't mean Jesus was having 13 days of non-stop sex with a foreign queen

. I mean, he could be an historical figure about whom there are some historical facts (his mother was named Mary, some of the preaching and parables, likely the crucifixion) but who then accumulated a whole host of other, more fanciful stories, related more to his significance to the tellers and their culture than to actual facts about his life (the miracles, the Transfiguration, the birth narratives, the Resurrection).
It does mean that we then have to look carefully at the stories and realize that we can't simply take all of them at face value. Some of them are more important symbolically than factually. I think it actually strengthens one's faith by making you challenge and think about the narrative rather than simply going "Oh cool" and embracing the literal account.