Faceless the Nine tails is as powerful as all think, it just needs Naruto its Jinchuriki to correctly use its power. Besides sealing techniques, I doubt any one Ninja (excluding Hashirama because thats just not fair) Could take down the Nine tails if it had the capabilities to strategize like a real ninja and fight with tactics. We only ever saw the nine Tails unleashing ridiculous powers but if the Nine tails was sending out crazy jutsu and fighting with the capability to think like a Ninja you'd be done. Thats where a Jinchuriki comes in, they do all that plus add any already known jutsus talents and power on with their tailed beats. Now all 5 kages everyones right Naruto would have to do fake death no jutsu. Now one on one Sage mode. It's close for anyone Gara I think he might beat if he came in evil as Sasuke because I don't think Gara emotionally could go all out. Rakikage, well that would be a close match up, but if Naruto could piss him off and trick him to rushing him and hit him with FRS close up or get him to punch him it would ruin him as Leaf eater said. With Amateratsu he just had to loose the limb quick but FRS destroys his chakra network, so no more hand signs or weaving after that. Mizukage I don't know much about her abilities or power But I say if Naruto hits her with one giant rasengan or a regular one or even a Frog Kumi I think its called punch she's done. As long as he avoids her acid. Now Tsuchikage is tricky guy, I don't know much about him But I do know he has massively destructive jutsus so I'm not sure he could take him. But I say Naruto with his New Fox cloak, will beat any of them one on one, Except maybe Tsuchikage, and Gara might stand a chance if he took to the skys.