Pretty sure the Mormons qualify. I'm not one myself, but I used to live next door to a few, and this looks like a fair representation of their beliefs. The money quote:

Mormons believe that human beings are children of God, and as such, have within them the potential to become like God. Got it? Let me say it more clearly. We believe that we can become Gods....Here’s shocker #2–we believe God used to be a man, just like us.