All of the following except for one have been Oscar nominated for Best Supporting Actor four times. Who is the exception?

The following actors have received four Oscar nominations for Best Supporting Actor during their careers. They are: Walter Brennan, Arthur Kennedy, and Jack Nicholson.

Concerning Al Pacino, he has received three Oscar nominations for Best Supporting Actor. He got a Oscar nomination for Best Actor in a Supporting Role for Glengarry Glen Ross (1992), for Dick Tracy (1990), and for The Godfather (1972). Over and above his Best Supporting Actor nominations, in 1993 Pacino won the Oscar for Best Actor in a Leading Role for Scent of a Woman (1992).

With the careers of Walter Brennan, Arthur Kennedy, and Jack Nicholson respectively, please note. Brennan won the Academy Award for Best Supporting Actor in 1936, 1938, and 1940. In 1941 he got the Best Supporting Actor nomination for Sergeant York but he lost. Next, Kennedy lost the Academy Award for Best Supporting Actor in 1949, 1955, 1957, and 1958. Regarding Nicholson, he lost the Best Supporting Actor Oscar Award in 1970, 1982, and 1993. He won this award for Terms of Endearment (1983), which in fact won five Academy Awards: Best Picture, Best Director, Best Writing (Adapted Screenplay), Best Actress (Shirley MacLaine) and Best Supporting Actor (Nicholson).