Frank Gorshin(1933-2005)

His manic portrayal of the Riddler on the television series Batman (1966) was directly responsible for turning the character in the comics from a minor villain into one of Batman's major recurring enemies.

I do not do hundreds of impressions. My entire repertoire of impressions numbers less than 50. I never set out to do an impression of a person. However, when something a star does suddenly sparks my imagination, I find myself doing an impression of him--first for my amusement, later for my repertoire.