Naruto for me, Itachi did well in preventing a civil war but he himself said he failed and that he should have trusted sasuke to change his parents minds. I'd say Sasuke would have ended up being more of a threat to the village than the whole uchiha clan which from what we've seen weren't that brilliant, he still can be... also itachi stopped 2-3 edo tensei, and he had big help with that as well, it's not just his feat, itachi just dealt the finishing blows. the only ones I remember were a trapped Dan, Kimimaro and Chiyo, plus Nagato in the figt. although I suppose it's not his fault Madara is above ET.
Naruto's done so many feats that I suppose they're getting forgotten. at 12 years old he had already stopped Gaara from rampaging in the village, at 16 he stopped Pain and convinced him to revive everyone he had killed, he's ridden konoha of the threat of the kyuubi going wild, he singlehandedly took care of the zetsu problem, took down 3 edo tensei including two former kage who would have killed countless more, saved countless from the juubi and is instrumental in the current fight.