Well, there was a guy more radical an than Rush for a while but got brought down for being too problematic even for the time.
If you're referring to a person on radio, I don't know who that would be.
If you're referring to a person on television, that would be Morton Downey Jr.
I randomly watched Morton Downey Jr, TV show a few years ago. He was more deplorable and in your face then Rush. He was also a militant smoker's right supporter, and chain smoked live on his show. He died of lung cancer a decade or so later.
