Well, I don't know if I cast my lot 100% behind Foghorn Leghorn...I would say that Warner Brothers is possibly the greatest Cartoon company of all time with all their characters holding classic status, but as for who's the real G.O.A.T? I'd have to pick a few, in no particular order:
-Mr. Mackey (M'kay?)
-Mr. Slave (Jethuth Chritht!)
-Coach McGurk (from home movies-if you haven't seen it, see it)
-the moonenites (Bow to your digital ruler! No one can withstand the quad laser!)
-Carl (from Aqua Teen Hunger Force also-I don't NEED no instructions, to know how to RAWK!)
-Snarf (snarf snarf)-ok that one was a joke, he's right down there with Orco for being one of the most useless characters ever
-Soundwave from transformers
-Quick Kick from GI joe
Man, I could go on and on, I guess I've seen too many cartoons...what about Launchpad McQuack? Or Huey Dewey and Louie? Inspector Gadget (even though he was just a watered down cartoonated version of Maxwell Smart...)?
Hannah Barbera had a lot of great cartoons back in the day, like Space Ghost, Johnny Quest, Birdman, the Herculoids...most of whom have come back as even greater characters on their Cartoon Network. I really like the Venture Bros., Brock Sampson should be on the list too i think...
I'll start a much easier to choose side poll: Worst character of all time?
-Scrappy Doo
-Snarf
-Ed, Edd, or Eddy?
-slimer