Think little of top 10's, its really irrelevant.
But i agree with you, its the same as healthy itachi, prime hiruzen and lately people trying to convince others that minato had km when alive. Its things fanbase do, to increase their fav character's powers and i was guilty of that in the past.
The reason healthy nagato doesn't really exist is that he hasn't accumulated experience with the rinnegan when he was healthy the same way he has when using the paths. Now i am not sure of this my self but nagato during his fracas with hanzo where he got his legs blown off was roughly 10-15 years ago.
While he seemed skilled with the rinnegan that time, its fair to say he has gained more experience and has grown stronger than ever while crippled, but using the paths.
You cannot therefore give nagato his legs, the nagato that faced hanzo and co, but at the same time the experience of nagato 10-15 years later.
That version of nagato is edo nagato with hachibi chakra absorbed.
Finally i believe the strongest version of living nagato is the paths rather than the one that got his legs blown apart