Not including Pain cuz we know. Not including Madara cuz theres no way yet.
Naruto vs Itachi
Naruto vs Kisame
Naruto vs Sasori
Naruto vs Orochimaru
Naruto vs Deidara
Naruto vs Kakuzu
Naruto vs Konan
Naruto vs Hidan
Hmm. alright lets begin....
Naruto:naruto: vs Itachi:itachi: : This I think itachi :itachi:wins hands Down. No probs.. All coz of his Genjyutsu...
I think that rasen shyuriken would penetrate Susanoo but he would first be trapped by the Genjyutsu... even that wouldn't be as effective though (as naruto has pretty good levels of stress control issues because of using so many kage-bunshinss but still that would chop him out (not literally) of the match.. Also he's got those two IMBA weopons which trumps Naruto bad...
Naruto:naruto: vs Kisame... Now considering that the 9-tails can't be used I think naruto has a 50% chance of winning as-well as loosing. Dats because of sage mode
a) he's got a massive amount of chakra in himself anyways...
b) sage mode gives him alot more chakra...
c) my guess is the shark-skin sword has a limit 2 hw much chakra it can suck up
d) My guess is that with sage mode naruto would be WAAAAAAAAAAY faster than Kisame...
Naruto:naruto: vs Sasori: This my guess is that Naruto would win because sage mode gives him a dead fast movement speed 2 avoid d needles.. And den he can just Wipe Sasori of the Planet by using a Giant Rasen-shyuriken., Destroying sasori and his toys..

D). Also his speed matched sakura's:sakura: and Grandma's.. so voila, naruto beats the crap out of Sasori and den can hav a boul of raamen in the same speed as it tuk :sakura: to wipe out sasori.
Naruto:naruto: vs Orochimaru: My guess is that Orochimaru in his weakened state would definitely loose 2 :naruto:.. But in his normal powerful self I Doubt Naruto can Win....
Naruto:naruto: vs Deidara ; this I beg to differ with many people on the forum.. I think Naruto can Win this. because even though Naruto Does not have MS, he can detect the tiny things of C4 karura with his sage mode. he'd be able to out-run the blast radius of C4 karura. And for the suicide bomb he can teleport to Frog Land(Myoboku -whatever) just like Jiraaiya did.
oh and the land-mine thingy- he could just blow the place up using massive no. of kage-bunshins... and blow all of those land-mines...
Naruto:naruto: vs Kakuzu : the first incident of the Rasen-shyuriken was just bad luck. and did he even use sage mode den??? Dont remmbrer bt I don't think so. So dats dat and kakuzu is just gonna be toasted before Kakuzu can say "I LOVE MONEY"!!!!!!!!
Naruto :naruto:v/s Konan . i cant be 100 % sure (because don't know her full abilities yet) but my guess is that she'd be toasted too as rasen-shyuriken rips out all her paper...
Naruto:naruto: vs Hidan. Damn.. Now this is sumthing I would hav LUUUUUVD to see. the match would be between stupid v/s stupider. but my guess is that Naruto would be too fast for hidan in his sage mode (And since Naruto already has intel that this guy does not die but his body cant move if his head is not on his shoulders den I would guess that Naruto would be able to chop his head with maybe a Kunai by using his Wind element and chopping throught what-not..
Naruto:naruto: v/s Zetsu " Now this is not predictable because Zetsu's fighting power has not really been shown properly.. So can't say at alll.
Naruto:naruto: v/s madara : well this for the Moment would easily go to madara (specially since no bijuu allowed) .....
Naruto:naruto: v/s Pein : I think Naruto takes this Fight as
a) he's better now than when he actually fought Pein.
b) he also got intel on Pein now(its der chk).
And dats my 2 cents....

xd