So far I've gotten a Shaman, DH, Monk, DK, Paladin, and Lock to 110 and am now working on my Warrior. And from all those classes, only the Warrior remains not the leader of the Order Hall, they are still second fiddle to Odyn.
My Shaman took over Thrall's role (and weapon, lel) after he became incompetant as the leader of the Earthen Ring/Shamans. My DK has powerful DK lore characters as my followers and took over TLK's role (and weapon, lel) as the leader of the Ebon Hold, my Monk was given the Grandmaster title, which is the leader of all Monks (after the previous Grandmaster was killed in the demon attacks), my Paladin took Tirion's place (and weapon, lel) as the Paladin's leader after he died, my DH is the representative of all DHs in the world and lead the entirity of Illidan's army, he could literally start another BT raid.
My Warrior takes orders from an annoying fire-bearded fuck who sits on his huge throne in a bored fashion as his finger taps on his armrest.