If you don't mind, can you do some research and check it's classification! I bet our argument will be settled once you do that.
u should take ur own advice dude, nagato was given the rinnegan by madara
but that doesn't mean he can use it right away its required training for many years there is no such thing like instant jutsu u need to train to get better
First things First if you believe that "HEALTHY" Nagato beat KMN and KB and if it weren't for Itachi, Nagato was in god mode then I don't see much point in arguing.
Now at that time KMN was just screwing around agreed Itachi helped him but that was because he was happened to be there..Naruto still could've escaped that situation by summoning Gamabnuta right then and there just to break free from Nagato just like he did against Garra's Sand Coffin back in part 1.
Because as stated before Nagato is a close range fighter.
Now for Minato vs Nagato :
Gedo Mazo is a real bad-apple I agree but It couldn't do shit to Hanzo and he only used the Body Fliker...Minato on the other hand has the FTG and More Speed.
Also we know what happens after Gedo Mazo is summoned Nagato was alomst Zombie'd...Tobi the smart-ass used a different body to avoid this drawback and its something that only He could do it.
Nagato won't a able to keep the Gedo Mazo around for a longer time and Minato can Spam FTG for a while...also Nagato'll be so drained that he won't be able to walk after Gedo Mazo let alone fighting.
wot??? nagato close ranged fighter ? ASURA PATH is the answer
remember back then do not yet mastered his rinnegan, he only use it through anger/emotion
and also nagato has been sync with gedo for many years and u said he can't keep it for long ?
last time i checked the bijuu sealing ritual take 3 days and 3 night with gedo mazo summoned,
and also tell me what kind of minato attack will hurt nagato ? rasengan ? kunai attack ?
as far as i see nagato have preta path covering all his body while physical can be countered with shinra tensei which is do not have 5 secs interval in healthy nagato case.