Bolland is one of the best true illustrators in comics. His most famous work is The Killing Joke, with Alan Moore. He does amazingly detailed linework that combines with realistic modeling and deep shadows to form rich, realistic art, especailly in his figures. He also has a history of creating macabre, surreal scenes that incorporate horro elements, made all the more gruesome by his realistic style.
Currently, he's doing great covers, both in a simplified Silver Age style for Flash, and a more detailed, painterly style for Gotham Knights. Most of the pictures here are from the Gotham Knights covers, and feature the Batman characters.
J. Scott Campbell
P. Craig Russell