The ensemble cast of The Golden Girls was obviously selected by a theatrical casting genius. It is extremely rare to find a combination of personalities and talents that can work the kind of on-screen magic that Rue McClanahan, Beatrice Arthur, Estelle Getty, and Betty White produced.
McClanahan's open sexuality, combined with Getty's acid-tongued judgments of the others, Betty White's portrayal of the semi-conscious, "lights are on but..." Rose Nylund, and Bea Arthur's role as the level headed peacekeeper could put those who watched the show on the floor!
Although it would be a very tough call, I'd have to say that The Golden Girls was THE funniest television sitcom ever produced - outstripping All In The Family, and even the riotous I Love Lucy.
Thank you, Rue. Thanks for all the belly laughs you brought to us in the high camp role of Blanche Devereaux. And at 88 (and one-half) years of age, as the only surviving member of the cast... Betty White, HANG IN THERE BABY!