If were talking about jutsu's that can be beat, Chibaku Tensei is ruled out concidering naruto broke thru it. Shinra Tensei is also ruled out because A: it has a time limit and B: naruto also broke thru it. Sasuke broke thru Tsukyomi. now for my list:
Strongest Offensive Ninjutsu: FTG, can not be blocked, predicted or countered.
Strongest Defensive Ninjutsu: Itachi's Susunoo, aside from FTG which can get around it. Itachi's Susunoo with the Sword of Kusanagi and Yata Mirror makes it the ultimate defensive with FTG of course being the only exception.
Strongest Genjutsu: Koto Amatsukami. Granted it takes 10 years to recharge without senju DNA but this Genjutsu can not be broken and the person under it also is unaware.
Strongest Taijutsu: This is a tough one but my opinion I would have to say the Hyūga Clan's gentle Fist style. With the Byakugan, this tech can see the chakra paths and seal them which is pretty damn effective.