A distinctive American character actor with roots in Broadway musicals, Eileen Brennan was best known for her Oscar-nominated supporting role as an unrelenting drill sergeant in the fish-out-of-water comedy “Private Benjamin” (1980). Prior to that high profile accomplishment Brennan spent the 1970s working with distinguished directors like Peter Bogdanovich and George Roy Hill, for whom she offered up stellar supporting roles as sharp-tongued, world-weary dames in “The Last Picture Show” (1971) and “The Sting” (1973). The smoky-voiced comedienne whose silent film star features made her a