here's a great site for finding the too-often uncredited artists of frequently beautiful science fiction and fantasy novel cover paintings: internet speculative fiction database
for example: this cover painting
, which it turns out was done by Kinuko Craft (but isn't featured on her website or galleries); also, you can see all the other covers
they have for different editions.
i also found that this painting
, which graced the cover of what a brief skimming suggests is a pretty forgettable collection of text upon which i happened, is by Bob Pepper, who did a bunch of other nice cover art.