http://www.mmo-champion.com/threads/...6#post38938686
So, Nazgrim for now, who knows for the other three.
Warriors going DK. Fantastic.
EDIT:
http://legion.wowhead.com/quest=42536/regicide
http://legion.wowhead.com/quest=4253...ruined-kingdom
Thoras Trollbane, the warrior king of the warrior nation, also a rider.