Actress Marcia Wallace  the voice of Edna Krabappel on the Fox show ‘The Simpsons’ and earlier Carol Kester, the receptionist on the 1970s sitcom ‘The Bob Newhart Show,’ has died aged 70. Photograph: Fred Prouser/Reuters

Marcia Wallace, the voice of scoffing schoolteacher Edna Krabappel on The Simpsons, whose wisecracking characters on The Bob Newhart Show and other Am(...)