If you ask yourself about who's Anakin's father, you're questioning Star Wars essence, because all SW story is about glory, fall and redemption. (Look for example what's written on Darth Vader's chest) I mean that SW is the story of Anakin Skywalker, the chosen one, the one who must bring balance to the Force so HE is the force, just like the Christ. Then, his father MUST be the Force itself, who created him to save it.
Well, what I wanted to say is that I think that SW story cannot exist if Anakin is not the chosen one, that is to say "son" of the Force...