Bob Gunton and Beth Fowler as Sweeney Todd and Mrs. Lovett in "Sweeney Todd" (1989)."You have to love a character to play him" " Bob Gunton. And yes, that of course includes playing a character like Sweeney Todd. The first Broadway revival in 1989 of Stephen Sondheim's magnum opus was a scaled-back version, far different from the original staged by Harold Prince eleven years earlier. Satirically …