87. Mabel Choate
Best-known episode: "The Rye"
Late in life, actress Frances Bay established a career playing sweet little old ladies in films like Happy Gilmore. On Seinfeld, she had a brief but impactful appearance as Mabel, the feisty bitty who buys a bakery's last marble rye and refuses to sell it to Jerry. (Ever the gentleman, he just wrestles it away from her and calls her an "old bag.") Fear not: She'd have her revenge a few episodes later when she vindictively cast the deciding vote in Jerry's father's impeachment. TIM GRIERSON