A key female performer of the American film renaissance of the early 1970s, Karen Black was known for her warm smile, sturdy-yet-fraught quality and imperfectly set eyes. After earning praise as the small-town waitress who falls for upper-class drifter Jack Nicholson in "Five Easy Pieces" (1970), Black lent her versatility and unconventional beauty to a number of both offbeat and mainstream films, including Nicholson's "Drive, He Said" (1971), Robert Altman's "Nashville" (1975), in which she sang and earned a Grammy nomination for her efforts, and Alfred Hitchcock's swan song, "Family Plot" (1976)....