Thomas Baxa is a god of dark fantasy. He creates all sorts of nightmarish images for Magic: The Gathering, World of Warcraft CCG, Dungeons & Dragons, et cetera. He's pretty much the go-to guy for demons, zombies, horrors, ghouls, et cetera. I've always thought of him as the gold standard for evil with Rebbeca Guay on the other end of the spectrum with her angels, fairies, et cetera.
Baxa also has Wicked Fairies, his line of zombified fairies shirts. Jeez that's awesome.
Some stuff that blows me away; Zombie Infestation, Gluttonous Zombie, and Bad Ass, the Zombie Donkey. I'm going to go ahead and repeat that; It's that important. Bad Ass, the Zombie Donkey.