Adding a Teaspoon of Vampire? Ask the Reader

I was listening to the podcast of Alan Sepinwall and Dan Fienberg, and Dan jokingly suggested that you could add vampires to any TV show and it would help.  They then joked about Mad Men.

But it is an open question: which shows could use some vampires or could have used some and which characters?

• Does M*A*S*H work better with Hawkeye as a vampire?
• Diane in Cheers?
• the Christopher Lloyd role in Taxi?
• Dr. Johnny Fever was probably a vampire already.
• George Clooney in ER?

What say you?