IMO: 6 tailed naruto

[frozen5]

power ups upto pain arc.

So few ninjas can actually beat 6 tailed naruto :-

kisame - if naruto's cloak actully gets affected by his SM then kisame is a statue

hashirama - easily

madara - rennigan and that uchia return saves him

yamato - maybe if he bust out an awesome wood tech

itachi :

healthy - it can go either way
sick - gets owned

gai - can go either way or both ways

no one else if you feel your fav can survive feel free to say why

 

[I'm stupid real stupid]

Ramen guy would neg diff him along with half of the narutoverse

 

[Gerkak]

war arc obito wins low diff
KCM naruto wins low diff
EMS sasuke wins low diff
gai 7 gates wins mid diff
war arc kakashi wins mid diff

 

[frozen5]

war arc obito wins low diff
KCM naruto wins low diff
EMS sasuke wins low diff
gai 7 gates wins mid diff

up to pains arc man

ems sauske gets chowed
gai 7 gates is high dif