Being a VERY big fan of both anime's (if you consider avatar an anime) then judging by how goku seems to have no limit to his power and the lack of consentration and focus the avatar state has (which we saw when Aang didn't even see the lightning Azula struck him with) then I would have to say Goku.
Goku
Goku. He destroys planets.
goku super saiyan would win for sure.
Goku would win. It has already happened.
Avatar Aang
Aang, no question. I have to root for Goku on this one, but it would be a tie on the account that both of them can come back from the dead. I would definitely say that Aang would win in the fight, because he can kick some pretty serious butt when he's in his Avatar State. I don't think Goku would stand a chance. Haha aang can tear sh** up when he is in the avatar state. But ss Goku 4 is too powerful for any anime character ever made! goku can probably beat aang as ss2... ss4 would make aang not want to come back to life!
Starting with his fusion with Nail, Piccolo would win. Before that, he would lose.
goku he's powerful and filled with courage
yes...
They would have to fight first
If you talking bout buzz lightyear he will get creamed by Goku.
goku ssj 3