Probably Itachi.
no, only one possible is tobi.
When they fought in the valley, Sasuke was just more powerful
Yes, because he has the ultimate power. More powerful than the Kyuubi no Yoko, more powerful than Mangekyou Sharingan, more powerful than Futon Rasenshuriken. His ultimate power is the best: He is the main character.
Sasuke,Negato,Kabuto,Madarra,Itachi,Naruto,
Yes
With Naruto mastering sage mode even better than jiraiya, sasuke does not have a chance unless he unleashes his new sharingan after killing Itachi
there is much more powerful than anything in Naruto Shippuden.and that is the Moon's Eye..Uchiha Madara wants to acquire the Moon's Eye to conquer the world...its much more powerful than Susanoo..
in the game? i dont think so but if you read the manga, yes kakashi did admit that naruto has surpassed him when he defeated hidan and kakuzu.
At first Itachi was stronger but Naruto learned more techniques so he is now more powerful.
sasuke is powerful than naruto, but only because of orochimaru's curse mark, and because he ditoxided sasuke with special medical pills. on the other hand, naruto is mentally stronger, considering he keeps to his words, and he does good
Because the nine tailed fox inside of Naruto becomes too powerful when Naruto goes four tails or more and causes Naruto to lose control.
Yes it is but i believe dragonball is more boring than naruto
Naruto is definitely better than Neji. Naruto defeated Pain, the akatsuki leader which proved that at this time he is the most powerful in the leaf village.