Patrick, Unless, I missed it, I haven't seen a list of sketch card artists yet. Here are the ones I have seen so far (16)...
Brower, Jason
Camera, Neil
Comes, Ron
Engstrom, Brent
Gambino, Joe
Graham, Dustin
Gross, David
Grossberg, Joe (Joe G.)
Kirscht, Matthew
Parisi, Mark
Pingatore, Mark
Simko, Joe
Smokin' Joe
Taylor, Strephon
Wheaton, Fred
Zapata, Jeff
Apparently, Joes are abundant amongst parody artists. I don't recall Ron Comes, Joe Grossberg, and Dustin Graham doing sketches before. I am impressed with the titles I have seen by all three... very nice.