12 Controversial Comedians: Daniel Tosh, Kathy Griffin, Ricky Gervais
12 Controversial Comedians: Jeffrey Ross
The "Roast Master General" has mellowed his image in recent years -- appearing on "Dancing with the Stars" for PG-rated entertainment. But Ross, who is a fixture on Comedy Central's celebrity roasts, used to be known as one of the meanest comics alive. At Charlie Sheen's 2011 roast, he joked that Mike Tyson had bled in fights more than Sheen's ex-wives.