Okay, let me get this straight. You have both Simpsons and Futurama on your list, both by one person, yet Family Guy is also there but not accompanied by its other creation American Dad?
You fail.
But as much as I like those cartoons, none of them beat Cow and Chicken, my personal favorite, along with a couple others, like Powerpuff Girls, the Ed's, Animaniacs, and Beavis and Butthead.