I pick Tony Di's style as the most unique, so I voted for him. Todd Lockwood is like a Larry Elmore with more polish and better sense of dynamic composition and action, so I'd put him in second place. WAR is groovy, but I don't see him expressing the same range as the others on the list. Elmore was actually very good, but recently most of his pieces I've seen have been stiff and boringly composed.
Tony's work is beautiful fantasy, very diverse, airy, and magical. He wins because he captures the real magic of fantasy, though I'd put Lockwood in a close second because he captures the Hollywood-style fantasy remarkably well. But that's what you get when you work for decades.