Kayle works, but she's still too soft.
Darius is quite fitting, but I can't think of any others.
Valoran needs a religion (very vague like Warcraft's Light to avoid parallels with real religions) and an order based around it to spawn various zealots and high priests and inquisitors.
Malzahar. He has a cult of void worshippers. In game, you get very zealous with his space aids (malefic visions). LOL
Xin Xhao. Protects the king of Demacia at any cost, and would lay down his life in an instant.
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