I hate to make the comparison because, frankly, it seems unjust. One is pure evil, one is pure, simplistic joy. But in The Dark Knight, the goons essentially have the Joker on a leash. When they really want to get serious, they cut the leash and all Hell breaks lose, and not even the goons can stop the madness.
Calvin Borel is a Kentucky Derby mercenary without the sociopathic tendencies of a mass murderer/bank robber/anarchist in face paint and facial scars. But he is the ace in the hole.
Borel has won three Kentucky Derbys since 2007, more or less in the twilight of his career. He's not the greatest jockey on the planet, but there's something about Churchill Downs that brings out the best in him and the best in the horse below his 110-pound frame.
All of which makes Calvin Borel the King of the Kentucky Derby.