unfortunately i have to say , orochimaru is the strongest , if you guys have realized , the only times he got defeated is when he was hurt or weak ,,,, did you guys see the fight between him and the four tails when he was in his full strength , he was smiling the whole fight , and all the forbidden jetsus he knows ,,,,, now that i think about it , his kinda cool and the other two hardly defeated him even though he fought with only mouth and legs if he fought pain , i think he would have don a better job then jiraiya ,