South Park is, to put it mildly, trash. As for the Simpsons it has been ages since I seen them. Though I do recall that a couple times they could elect laughs from me. Family Guy I have seen more of, but I still don't think it is uber great. But at least Simpsons and Family Guy are better than South Park(and yes I have actually watched a fair amount of it, about as much as I have watched of the Simpsons).


Now if you want to know the one that does Social satire/mocking the best I am really unsure there, but I have the feeling Family Guy is at least a bit if not quite a ways behind the other two in that regard.