they nearly had one but kinda shoved it under the rug.
Benedictus in cataclysm. He was the head of the cathedral of light and in cata was found out to be a sleeper agent sided with Deathwing. They dealt with him in the quest event, not even a dungeon so even if timewalking happens you dont see him. This could have been big and used to break a part of alliance as conforming to void and destruction much like cult of the damned. They could have used it as a thread that while humans are quick to judge the forsaken and the orcs for old wounds they keep turning a blind eye to how quickly they fall to death cults and world ending cults to cause problems.
But nope.
world police pony brigade, here we go.