I know this isn't quite in scope of the OP, and I don't know if she's done any recent RPG work, but if I had the budget, I'd hire Laurent Reis in a heartbeat.
oh wow totally and shamefully missed that bit. ok, i'd say that out of recent books Electric Bastionland takes the cake. generally just anything that has Alec Sorensen art, like the revised Stygian Library.
I like the art (or most of it) in the various transformers RPG books, but I think that's mostly because I'm a transformers fan and it's mostly comic book art so it's already good.