Illidan after the most recent Warcraft novel and before he comes back in the new expansion.

He was raising an army in Outland and taking it over in an attempt to learn more about the Legion to be able to attack/defend/destroy them. And we heroes came in and killed him cause he happened to look like a demon and we had bias Malfurion and Azerothians nay-saying him. All cause the legion decided to stage the original "invasion" (or burning crusade) so we'd come in and wipe him out for them.

Poor Illy. Still a dick but not as much of a dick as we thought.