yes edo madara > nagato
nagato has way more nature changes then tobi, he has them all therefore
nagato>/=tobi , the gedo maze was more in sync with nagato and a healthy nagato with rinnegan and 6 paths beats a rinnegan tobi or equals him anyway because of tobi's extra sharingan powers on top of the rinnegan ones
HOWEVER THIS IS ONLY FROM WHAT WE'VE SEEN SO FAR , i have an open mind that tobi has more up his sleeves then waht we've seen so far if he is convinced he can defeat the juubi , so possibly when i see these powers up his sleeves tobi>nagato
and no nagato>ems madara , theres a reason the rinnegan is the next level from ems, nagato wins high difficulty he has more chakra then ems madara and a healthy nagato with 6 paths wins in the end aswell as his nature changes , he'll probably die in the end from chakra exhaustion but in the end he'll deliver the death blow to madara through shinra tensei or something like that
and no nagato>bm naruto , nagato would of beaten bm naruto in a 1 on 1 fight the only reason he won was because he had help from B and Itachi two of the strongest dudes in the narutoverse