See this post for a picture of Johnny Moss - he's in the middle:
http://www.thechipboard.com/index.cgi/page/1/md/read/id/1130926/sbj/quiz-no-prize-who-knows-who-these-people-are/

Johnny Moss was a great poker player in his day. Won the 1st and 2nd year WSOP (when it was much smaller).
He also beat Nick the Greek in a marathon heads-up game at the Horseshoe.
Famous player, friend of Benny Binion, poker room manager around LV in his later years.
You can read all about him on Wikipedia.