George Carlin

 
According to his wikipedia enrtry, Carlin was especially noted for his political and black humor and his observations on language, psychology, and religion along with many taboo subjects. Carlin and his "Seven Dirty Words" comedy routine were central to the 1978 U.S. Supreme Court case F.C.C. v. Pacifica Foundation, in which a narrow 5-4 decision by the justices affirmed the government's right to regulate Carlin's act on the public airwaves.

Carlin's mid-2000s stand-up routines focused on the flaws in modern-day America. He often took on contemporary political issues in the United States and satirized the excesses of American culture.

A disciple of Lenny Bruce,^[19] he placed second on the Comedy Central cable television network list of the 10 greatest stand-up comedians, behind Bruce and ahead of Richard Pryor.^[20] He was a frequent performer and guest host on The Tonight Show during the three-decade Johnny Carson era, and was also the first person to host Saturday Night Live.

source: Wikipedia