influential person

VIP big enchilada big gun big kahuna big wheel boss chief head honcho leader person in charge top dog

bigwig dignitary heavyweight mogul

VIP big cat big cheese big fish big gun big kahuna big man on campus big wheel celebrity fat cat head honcho heavy-hitter high man on the totem pole high-muck-a-muck important person muck-a-muck nabob notability notable personage somebody someone star wheeler-dealer

VIP big cat big cheese big fish big gun big man on campus big shot bigwig dignitary fat cat head honcho heavy-hitter high-muck-a-muck important person mogul nabob notable somebody