Blizzard does high drama well. Tyrael is the former Archangel of Justice and has battled for centuries against the forces of Hell. Heaven’s rulers want Sanctuary – the human plane in the Diablo universe – destroyed, but Tyrael fights to preserve it, despite his previous belief that humanity is an abomination that should be eliminated. He's a complicated dude, but he remains a pivotal figure in the war, borne on his awesome-looking wings of light, with El'druin, the Sword of Justice, held high.
Iconic moment: Imagine if your buddy accidentally freed a Prime Evil and unleashed unimaginable terror on the world. You’d be super bummed. But Tyrael is nothing if not pragmatic when his acolyte Marius messes up, simply impressing upon him the gravity of his action and giving him a good plan to help fix it.