TV Shows Where the Main Character Is Also the Best

This week's question comes from reader James Cobb:I've noticed that when someone lists their favorite character of an ensemble TV show, they usually pick a supporting character rather than the lead. I'm guilty of this, too: Kaylee is my favorite Firefly character. I think it's because it seems kind of lame to pick the lead as your favorite. (Saying Thomas Magnum is your favorite Magnum P.I. character makes you sound like a tool.) But there are a few shows where I think that the main character is the best one on the show—my favorite character on Star Trek: Deep Space Nine is Captain Sisko. Who is your favorite character on a TV show who's also the lead?