He was quite the accomplished artist and intellectual. His series, Atheism: A Rough History of Disbelief is well worth watching. Miller was also part of Beyond the Fringe with Dudley Moore, Peter Cook, and Alan Bennett. They even put in a 1962 appearance on What's My Line?, as Beyond the Fringe was a Broadway sensation at the time.
Miller was a noted director of operas, a physician, and probably anything else he wanted to be.
Jonathan Miller, Dudley Moore, Alan Bennett, and Peter Cook in their 1962 appearance on What's My Line? Cook would subsequently make appearances on the show as a guest panelist.
Arlene Francis seems especially smitten with the Beyond the Fringe cast.
I have only one recollection of him, from a talk show. He said that on his passport or something, near "Eye Color" and "Weight", etc., there was a line to put "Build". He said he wrote "lissome."