Played by Chazz Palminteri
Like numerous other people on this list, Chazz Palminteri was a well-known actor before Modern Family became the funniest show on network TV. His most notable role pre-Modern Family included playing Sonny on the Broadway musical, A Bronx Tale.
When his role in Modern Family came to an end, he continued to find work on TV shows. He played in singular episodes of Law & Order: Special Victims Unit and Organized Crime. He even tried his hand at voice acting in the game COD: Black Ops II. He currently runs his own podcast called the Chazz Palminteri Show, which you can catch on YouTube.