Originally Posted by 8th_hokage
what about naruto. I think he also proved he's already a genius, but in his own way. I mean come on, mastering rasengan in 3 days? I dont think jirayja did it that fast..
Naruto doesn't really appear to be genius (at least not in the typical sense) because:
he is a jinchuuriki
he has not shown such a vast array of jutsus
he is a little headstrong in the manner he attacks (just charging at Kakuzu until he can hit him?)
I agree with Vengeance that Minato & Hanzo (possibly Kabuto) should also be included specifically to the initial list (in addition to your statement of all S-rank shinobi)