I'm going to leave out Costume Designers I consider artists otherwise this list would be way too long.
Iain McCaig (did concept art for the Star Wars prequels)
Sandro Del-Prete
Carlos Meglia. An Argentinian comic book artist best know for drawing the Cybersix comics. A lot of people are turned off by how he draws people (and I'll admit it's kind of ugly) but he is amazing at drawing cities (spoilers because it's a big picture and I didn't want to scale it down.