Ogre

From WoW: IncGamers World of Warcraft Wiki

Entered Azeroth together with the orcs through the Dark Portal in the First War, but didn't truly join forces with the Orcish Horde until the Second War, under Warchief Orgrim Doomhammer.

Most ogres has a very low intelligence, but a few have shown both great wit and cunning, and taken up the Warlock mantle. Some ogres are born with two heads, and are often more intelligent than other ogres, even though they might end up in conflict between the heads.

Since the end of the second war, the ogres of Azeroth has spread, and can now be found almost everywhere in the world's secluded places. Most ogres have chosen to not align themselves with the orcs again, and they are in most cases quite well capable of maintaining alive on their own.