Brooks with an EGOT

MEL

["This comedian and filmmaker won his Emmy for guest-acting on a 1990s sitcom and shares his last name with a famous American poet."]

This clue refers to Mel Brooks, the famous comedian and filmmaker who has won an Emmy, Grammy, Oscar, and Tony—the four major entertainment awards known as an EGOT. The word "Brooks" in the clue is his last name, and the answer is simply his first name, "Mel." It’s a straightforward reference to his rare achievement in show business.