These days I'm super-in love with this guy's art for Shadowrun:
Víctor Manuel Leza Moreno. It seems his work for these rpg books comes from pretty recently, doing some covers and interior art for suplements like the historical setting Shadowrun 2050 and a shitton of art for SR5. One of the problems I had with SR pre 3rd edition is that the art, while good and even great at times ALWAYS felt disjointed to me. As I said it seemed to get better with 3rd edition, but things like the art in Returns and the later products are really the most coherent its universe has ever looked.
I'd try to put the most core-cyberpunk pieces here, but man, the sexy ork chick and the superbadass trolls the guy draws (and even the first convincing female troll I've seen) deserve a look.
Okay, just a little bit more of Shadowrun by
Melanie Bourgeois "Freiheit"
and
Hubert De Lartigue
And now for a little mouthwash for those who get a bad taste from Shadowrun related stuff.
City_01 by
Shunsuke Yamaoka (thanks to Schiff for the catch of this artist!)
Cyberpunk Nights by
SaturnoArg
Cyber Merc by
Dmitriy Voskoboy
And some examples of
Ian "tower-raven" Sokoliwsky's Cyberpunk Photography and Gothic Robots: