Who played Rose Nylund in 'The Golden Girls'?

Who played Theo Huxtable in 'The Cosby Show'? In which TV series is Jessica Fletcher a main character? Who played Dorothy Zbornak in 'The Golden Girls'? In which TV series is Dorothy Zbornak a main character? In which TV series is Rose Nylund a main character? Who played Blanche Devereaux in 'The Golden Girls'? In which TV series is Blanche Devereaux a main character? Who played Sophia Petrillo in 'The Golden Girls'?