His origin by Jack Kirby, shows who he was before he was Galactus, where he came from, and how he became Galactus and all that, without anything to do with any other current characters like the FF.
Its so big and epic feeling, and completely other worldly, and explains why he is a force of nature and not a bad guy.
And it does all that without letting anyone down too. Sometimes when you create a character and then after a while reveal their origin its a let down. But his origin fits him and his place in the Marvel universe.