My favorites are Phil Foglio and Carly Mazur
Some favorite Foglios
(yes I like goblins)
And some favorite Mazurs
Alayna Danner has been one of my favorites for the last few years. I love her artwork.
In the older game, DiTerlizzi was my all-time favorite, with Verdant Force being one of the cards that made me fall in love with the game. John Avon, Quinton Hoover, Andi Rusu, Kaja & Phil Foglio, and Jesper Mryfors were some that really typified “Magic” to me.