You know, nobody's ever asked me this (that I can recall) and coming up with an answer is tough because I don't really have one style and I'm kind of all over the place with my influences and how I draw.
Definitely Eisner, although more so in recent years. Frazetta, Shirow, Jordi Bernet, Alex Toth, and Eric Powell would be some of the comic guys. At the same time, I also like the fluidity and grace of old school Disney art (when they still did 2D) and the dynamism and crazy exaggerated sense of motion in a lot of anime and manga.
I also really, really love the work of Peter de Seve and his stuff influenced me a lot in college. I'm sure I'm forgetting others that should be mentioned.