Stopped reading there.You do know that the power to the SO6P doesnt lay in the rinnegan........... but the will power of the individual. Naruto doesnt need rinnegan to become sage of the six path. its his will power and life force that make him closer to the sage than anyone................. the sealing naruto placed on kurama was the only time a tailed beast mentioned anything about someone resembly the sage him self. Wen kurama fought pain, and naruto fought madara, nagato, and tobi he never mentioned any of their powers being that of the sage's.............. my point is people are soo rapped up on the rinnegan than noticing the truth power of the sage "someone possessing his heart." Remember before the sage even created nin jutsu etc. he defeated the juubi with his pure heart and will power NOT the rinnegan or paths of pain. he stood up against evil and triumph and thats the true power of the sage of the six paths.
this is why he bestood upon his younger son his will and power(hisheart) NOT his eyes soo obviously they mean nothing unless the possessor of them carrys his heart. So naruto gaining rinnegan may give him strenght but hes heart and will to carry on good is his true POWER.
Now let me tell you what it takes to become a Rikudo
The eyes:Sharingan evolved into a Rinnegan
The body:Senju Dna
Those are the 2 ways to naturally awaken it.If you don't have those 2 then you have to be blessed by a transplant like in Nagato's case.
Naruto isn't becoming a Rikudo by sheer will power,just no U_U
And...
Madara>All
Tobi>All
Nagato>All