pretty much this
lock (destro) + mage (arcane)
this might/will actually turn out true, but Priests/Shadow Priests dont have any exampls of this magnitude yet unless you count a Void Lord or a Void Titan as a SPWith the direction the story is going, priests and paladins will be the most powerful classes. Nothing is stronger than the light and the void.
although maybe A'dal/Prime Naaru as a Holy Priest .. ?