Ed Benes is a great artist in my opinion. I loved the issue of Green Lantern he did, and hey he draws very sexy women. Whats there to not like?
My favorite artists are Frank Quitely, Dustin Nguyen, Tony Daniel , Andy Kubert and Jim Lee. Mazzuchelli, Brian Bolland, Lee Bermejo get a honorable mention for my favorite Batman artists but i don't think they've done enough art to earn a spot on my top favorite list.