Masashi Kishimoto ( Naruto ), Hayao Miyazaki ( Nausicaa of the Valley of the Wind, Spirited Away, Princess Mononoke.... ), and whoever that guy's called who made Cowboy Bebop... and while I'm at it, the authors of Full Metal Alchemist and maybe Fruits Basket, too!
( It's so darn hard for me to memorize these Japanese names, it's got to mean something when I do manage. =O )

..but if I have to pick one as an artist, probably Miyazaki. Beats the Grimm brothers or Disney any day.