*claps* that was quick. Funny isn't it? You could base a very humane, yet quite awful character on the guy. Did you get the colorscheme too, then?
The phantom bishop...hmm...if you're going for a more religious vibe for the person, that might work. Perhaps the "Black Bishop" if so?
He kinda needs a 'large' army (Pawniard-stylish) in order to make it work (would resemble the Dex really well).
Also, he must firmly believe in the convictions he shares. Looking at Ghetsis might help you with the dialogue of the character.
The effect will be even greater if the protagonist kinda follows some of his ideals, too...
Perhaps there are other real-life villains you could draw inspiration from.