Board Thread:Naruto Discussions/@comment-5273810-20150607092302/@comment-2043993-20150629184135

Itachi and Nagato: wielders of the most powerful dojutsu in existence, both are powerful alone, but add their wisdom, maturity and intelligence and you practically get the ultimate unit.

Naruto and Killer B: nigh unstoppable jinchuuriki duo, turned an entire war upside down and helped save countless lives, also took on the above mentioned unit, even if they didn't win.

Zabuza and Haku: kinda the first proper tag team for the series, boasts near flawless teamwork despite having almost polar opposite personalities, trusting eachother and puts up a mean fight.