Zaglúk

Zaglúk was an orc king of Mt. Gram. The orc chieftain took his right to rule after the pitiful slaughter of the Greenfields. Zaglúk  ruled Mt. Gram and answered Azog's call to arms against the Dwarfs. In T.A. 2793 he marched underground to the defense of Mount Gundabad, though his force was great--the orcs were ultimately pushed back and Gundabad was sacked.

Zaglúk ultimately met his end in the Battle of Azanulbizar where he was clubbed to death by Thorin Oakenshield. This was another great humiliating death for the Orcs of Mt. Gram, and their forces dispersed as soon as their leader was killed. Eventually, they took in another ruler, but this act allowed Mt. Gram to go many years without finding a suitable ruler.