OMG, such noobs.
The Dark Exile
"Seven is the number of the powers of Hell, and Seven is the number of the Great Evils."
Duriel, the Lord Of Pain
Andariel, the Maiden of Anguish
Belial, Lord of Lies
Azmodan, the Lord of Sin
Mephisto, the Lord of Hatred
Baal, the Lord of Destruction
Diablo, the Lord of Terror
The one's in bold never werenever used in the game. Pfff... Just read the script...