Yea shaman are a bit weird. The class is effectively an amalgamation of W3 Far Seer, Shadow Hunter, Witch Doctor, Shaman, Spirit Walker, and Tauren Chieftain units.
*Which were made up of trolls, Orcs, and Tauren. I'd argue, if shaman are suppose to be first and formost masters of the elements then Orcs are the best definition of an OG shaman. Tauren were all about the spirit side of Shaman(Which is still a thing) and Trolls were on the voodoo side I.E. Hex.