I was torn between Madara, Itachi and Minato, but in the end I think I'll go with Minato, mostly because Madara already has some nominations. Minato's entrance was totally unexpected;
Uchiha Itachi.-> http://www.mangareader.net/93-146-2/...apter-141.html
This single page made me an absolute Itachi Fan.
Back then his style was much more cooler and colder than in Part 2. In an instant you knew that your are looking at one of the most epic, amazing and strongest Ninja in this Manga. Just by his appearance he stated for me that he is the obstacle Sasuke will never overcome.
I'll nominate Uchiha Sasuke.
The real Uchiha Madara's entrance on the battlefield from chapter 559. Amazing as hell!
Sage Naruto saves Tsunade
If 'modes' count I would nominate frog Jiraya, as it includes Ma's and Pa's also and "one-eye rin'negan, one-eye sharingan" Tobi
And it's not really a contest, IMO.
Uchiha Madara ....
Damn... I want to vote for Madara again, but Sasuke showing up with his Eternal Mangekyou was sex.
Pajama Sasuke or Power In A Name. Hm. Yeah, I'm going with Uchiha Madara.
Sage Naruto being summoned to fight pain was how I liked Naruto as character again.
Uchiha Itachi en part 1... That single moment when he totally plays with the konoha jounins like they were kids was simply too badass
J-Man when he was about to fight Pain for real