Jean Smart “would kill” to play another role like Charlene Frazier Stillfield. The 70-year-old actress starred as “sweet and gullible” office manager on the sitcom ‘Designing Women’ between 1986 and 1991 and admitted that these days she would love to take on a role similar to the late Betty White’s character Rose from ‘The Golden Girls.’ She said: “I would kill to play a part like that again — someone who’s kind of sweet and gullible. It’s funny, in some ways I see myself more that way than some other roles I’ve played recently. Like a Betty White on ‘The Golden Girls’ kind of part, that’s wha…