all at full power
naruto has his sage shit goin on.
sasuke unlocks some bad ass eye pupils
Minato is as good as he was when he fought madara
Itachi was as powerful as he has ever been without the ilness he had when he fought sasuke.
i think naruto and minato but at the same time we know sasuke has eternal mangekyou sharinghan and the ability he gets could swing it.
sasuke will also unlock sage powers, just as naruto has so will sasuke so they will be paralell in their growth.