Not a big fan of Todd Lockwood or Wayne Reynolds, in direct contrast to the great majority of people here, it seems. Mr. Reynolds' art is horrible, simply horrible. Not to my taste at all. Extremely, extremely hit-or-miss: for every piece with potential, there are four or five more composed of dreck.
I'd like to second whoever said Mr. Mullen- that man is spectacular, evocative, and always awesome. Best fantasy artist working today, from what I've seen.
EDIT: Holy crap, somebody likes Micheal Kormarck? I wasn't aware that washed-out photoshopping was popular these days.