Matthew Callahan, AKA "the guy with the Star Wars miniatures" has cute stuff and a nice visual style. I like his work on a personal level but don't know how to compare it with the other works because he's working in a different medium.
disse86: Does very dark work, rather reminiscent of HR Giger or John Jude Palencar on a smaller scale. Not to my personal taste, but I recognize the talent this takes.
Christian Quinot: fantasy painter. Looks like he might illustrate gaming cards. Not a style I really enjoy, but competently done.
Kukuroyu: a cartoonist. Not my style, but closer to it than the other artists...