That would make him a child molestor, not a pedophile.
But seriously, either way he did something he shouldn't have done, unless we give him a pass because he grew up in a culture that condoned it or we believe it was the will of Allah. Allah wanted the marriage and protected Aisha from being harmed. That argument is enough for believers, but we non-Muslims can dismiss it out-of-hand. But the first one, I believe, might make the case that he personally was not deviant the way someone today would be. As I said before, he married women of all ages. Pedophiles are usually exclusively interested in children. So, I agree, he wasn't technically a pedophile. He was a product of his times and his place and his position. In a universal moral sense, he molested a child, with the consent of her parents and their society, which make them all child molesters, in that sense. But they all obviously weren't born with this sexual dysfunction that makes for a true pedophile. And I don't believe Muhammed was either.
But who cares? What conclusion we come to about this will not affect what Muslims think of him. And we non-Muslims will not think better or worse about him because he doesn't mean anything to us. So who are we discussing this for? No one. It's just an excuse to try to make Muslims feel bad about their beliefs. Not saying that's wrong, but that's what it is.