What is another word for "broker"?

Roget's Thesaurus (1911) lists these synonyms for "broker": advocate, agent, ambassador, arbitrator, attache, attorney, auctioneer, bagman, bailiff, banker, bear, bull, business, buyer, cadger, cambist, camelot, chandler, changer, chapman, charge, clerk, colporteur, commercial, commissary, commission, commissionaire, commissioner, committee, concern, consignee, consul, corps, correspondent, costermonger, curator, dealer, delegate, deputy, diplomat.