celebrity, famous person, very important person, personality, name, big name, famous name, household name, star, superstar, celebutante, leading light, mogul, giant, great, master, king, guru;

dignitary, luminary, worthy, grandee, lion, public figure, pillar of society, notable, notability, personage, panjandrum

informal heavyweight, celeb, somebody, someone, bigwig, biggie, big shot, big noise, big gun, big cheese, big chief, nob, lady muck, lord muck, top brass, honcho, head honcho, top dog, supremo, megastar, heavy, fat cat

North American informal big wheel, big kahuna, kahuna, top banana, big enchilada, macher, high muckamuck, high muckety-muck