Mary Tyler Moore was a feminist in that her Mary Tyler Moore show, which she starred in and produced, portrayed a single working woman -- for the first time in television history. As Tim Teeman of TheDailyBeast writes, Moore's character was the very first female to have a sitcom based solely on her and her work life instead of her relationships and home life. While feminism was never a focus of the show, Moore played her character with strength and power, the ultimate sign of feminism.
Despite the Mary Tyler Moore show representing strong, independent working women, Mary Tyler Moore, herself, never identified as a feminist. In fact, Michael Trinklein reports in The Federalist that the actress specifically rejected Gloria Steinam and Betty Friedan's feminist cause. Trinklein quotes Moore as saying that she did not agree with their premise that women could have it all, and she felt that women's top priority should be motherhood.