Hmm... there's no way Sasuke's father is the leader. He was killed by Itachi in the first series, and he's name was Fugaku Uchiha, not Madara Uchiha. For you guys who thinks the 4th Hokage is the leader, he sacrificed his own life to seal the Nine-tailed Demon Fox (Kyuubi) into the newborn Naruto by using the Dead Demon Consuming Seal, the same technique the 3rd Hokage attempted to use against Orochimaru. Now, that name (Madara Uchiha) was mentioned only once in both manga and anime versions up to the current. He should be added to the poll, because he'll fight both Naruto and Sasuke at the end leading to one of them sacrificing his life for the other thus becoming the 6th Hokage (hmm Naruto??). hehehe I just made that whole 'Naruto and Sasuke at the end' part but seriously, Madara Uchiha is the man.