South Park>Futurama>The Simpsons>Family Guy
All these shows are on the massive decline except for South park (which has seen its better days). There was a time where Simpsons was greater than Futurama, but if Futurama continues at the rate its going then Simpsons might overtake it again. Family Guy was funny until all the characters got old (and that didn't take too long).
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I am no hero. Merely a man who has seen and done and endured what can never be forgotten or forgiven. ~ Magneto, Board 8's MEFC!