3. The Simpsons
The Simpsons used to be the best show on television. Now, however, it is but a husk of its former self, a tacky jacket worn by a show that wants us to think it's The Simpsons but is really just some mentally-ill fella who wants us to think he's The Simpsons. The only thing keeping The Simpsons at least somewhat relevant is the fact that it has managed to retain its entire original voice cast. No matter how bad or tired or repetitive the writing might become, Dan Castellaneta, Hank Azaria, and company will still be turning in wonderful work. Together they have created dozens and dozens of memorable characters that will live on in the throes of television history. But let's let them become history, shall we?