Let's get something straight.

[yuan of cruxis]

Naruto beat them all?

Not Tobi, Itachi, Sasori, Kisame, Hidan, Konan and Deidara

 

[yuan of cruxis]

Quite certain Itachi stands at the top, then Obito, then probably Nagato's paths etc

 

[immortal sage]

Obito>>pei/nagato

Nuff said

Actually I've said to much

 

[Kyle Dimetri]

in my opinion and let me repeat IN MY OPINION either between Kisame (who had enough chakra to flood the entire world) or Kakuzu (one of akatsuki's senior and most battle experience members) was the strongest