5.Maiev Shadowsong.
Because: -Incomprehensible concept art; -Stupid first-name.
4.Captain Varo'then.
Because: - mini-Guldan in the War of the Ancients, he deserved the death that befell him; -His bad deeds have no excuse.
3.Khadgar.
Because: -his image was spoiled in the film. Ben Schnetzer definitely not suitable for this role because of the appearance.
2.Xavius.
Because: -that bastard actually cursed Ysera. Was repeatedly killed and still it still exists.
1.Gul'dan
Because: -because of him the orcs became slaves of Legion; -because of him Orgrim lost the Second War; -because of him Ner'zhul could not stop the bloodthirstiness of the orcs on Draenor in time.