I say Danzo, he is a true ninja...making his moves behind the scenes, doing everything he can for the Village, doing everything he can to become stronger like his sharingans. But unlike oro he did that for his village...
Actuallly its shikaku. the dude is planning a strategy for all 5 nations! did not see that coming eh? all those other ninjas never done what he has done. the other ninjas would have met that standand but he comes out on top. xd