I will have to check out Arthur Rackman because I absolutely love Brian Froud. I have his Pressed Fairie Calendar hanging over the computer right now.
I know I have mentioned this elsewhere, but since he has his own thread now... He worked with Jim Henson to create the creatures in Labyrinth and The Dark Crystal. Both movies were favorites of mine in elementary school, even though they scared me a bit. I was a fan of his before I even knew who he was. Wendy Froud, his wife, also writes a little fantasy.