"The diffrence being the 4th sealed the demon inside naruto's body instead of his own. Now if the 4th was able to seal it inside a body other than his own, then maybe he did not die...There has been no proof that anyone saw him die, it was only assumed that he did."

Well I was an anime watcher up to when the third died....i remember when the third was fighting with orochimaru, oro used the edo tensei summoning technique. I believe he was about to call up the 4th hokage as well, but the third stopped it. So I don't think oro couldve summoned the 4th in the first place if the 4th wasn't dead.