Kash'drakor

A famed and legendary orc Draenor, Kash'drakor had the axe Serathil crafted for him, and used it in the Blood River War which came to utterly destroy the Dark Scar clan. Nazgrel, Thrall's advisor, is the last descendant of Kash'drakor.

Speculation
Kash'drakor was likely a warrior of some sort, considering he wielded a powerful axe. However, it is also possible that he was a shaman. He is presumed to be of the Frostwolf clan, which his later descendant Nazgrel most likely belongs to.