10. Aaron McGruder
The Boondocks is now more well-known as a cartoon than its original format: a comic. Its appearance on the comics page was akin to Public Enemy showing up on your doorstep. McGruder's layouts and characters were great, with enough artistic muscle to back the message.
9. George Herriman
Krazy Kat is a landmark. The use of dialect, the surreal backgrounds, the odd plot. Yet Herriman crafted such fine characters that readers embraced the visually peculiar. The love trianlge set in an allegorical world where ink reigns supreme.
8. Aaron Diaz
Visually, Diaz is king of the webcomic world. Dresden Codak, as a result, is a very infrequent comic. The amount of time is worth the wait, though. Tackling subjects the Garfield crowd can't handle, with visual layouts that are far above par, Codak proves itself time and again.
7. Dan Piraro
Piraro's Bizarro is a one-punch affair. The economy of a retort, a one-liner, or a Paul Lynde rejoiner. Single panel comics have different rules, and Piraro has taken advantage of this. Personally, my doodling style is more influenced by Bizarro than anything else.
6. Berkley Breathed
Bloom County, then Outland, and then just Opus. The penguin with weird friends and odd backdrops has come far. Put Pogo in a blender with Bizarro and you'd get an idea of the comic. Besides visuals Breathed great talent lay in dialogue.