Despite many comic book artists having been mentioned, I'm sort of surprised this guy hasn't come up yet (Simon Bisley):
It's quite easy to see who he got his main inspiration from, though, but he does some interesting proportion distortions at times (and a lot of filth... just Google it).
Also, I love that Roger Dean was mentioned twice, but nobody brought up Rodney Matthews. But I guess they're as close as Bisley is to Frazetta, so maybe it's unnecessary.
However, it's a true crime that Syd Mead has been left out so far. I mean, his designs are so pure and his skill (reflections especially) is crazy:
Also, the guy did vehicles and environments for Tron and Blade Runner.