How would Nagato win?? This is non edo Nagato we are talking about sorry, and he cant even walk, even if he was edo Nagato, remember he had trouble moving because of his body not being accustomed to the ability to walk. The way i see it is that the only reason naruto lost so badly against edo nagato is because first off, he was a friend, second, Naruto was not in cooperation with Kurama and therefore, Kurama was draining Naruto's chakra for every second he was in RM. Also naruto and bee had already covered a great distance and Naruto's chakra had already been fully depleted while he was running to the battlefield, therefore Naruto was in a weakened state.
In my opinion, Naruto+Kurama>Nagato