The Simpsons are still great. The Simpsons has been (except the first few seasons) better than Family Guy and South Park in the past and still is. However, Futurama is clearly the greatest of them all. Family Guy is funny, but sometimes it's just way too random without any actual point, in which cases the critizism given in the Muhammed episodes of South Park is very valid. It clearly has the least intelligent/clever humour out of these shows, but it still manages to be funny.