What is another word for "ambassador"?

Roget's Thesaurus (1911) lists these synonyms for "ambassador": advocate, agent, apparitor, arbitrator, attache, attorney, auctioneer, bag, bagman, bailiff, bearer, bellman, boy, broker, business, cable, carrier, charge, chore, clerk, commercial, commissary, commission, commissionaire, commissioner, committee, consignee, consul, corps, correspondent, courier, crier, curator, dak, delegate, delivery, deputy, diplomat, diplomate, diplomatist.