I'm not so sure about that. He is said to be "the hardiest of men"--not superhuman, but if the party's stuck in a glacier, he'll survive the longest.Aragorn can heal (because he is a king) but he can't speak to animals, speak to plants, or survive extreme temperatures.
Half-orc* hunter/ranger from (World of) Warcraft; I think he first appeared in Warcraft III. He's a supreme hunter and has a bond with his animal companions so they follow his commands perfectly. I don't know if he ever does any of the other things.Who TF is Rexxar?!
*The other half is ogre.
To the OP: You say in your title that Aragorn and a few other things "led to the ranger's loss of identity." But the ranger's original identity was just ... Aragorn. Is that really an identity to lose?