What is another word for "attache"?

Roget's Thesaurus (1911) lists these synonyms for "attache": advocate, agent, ambassador, arbitrator, attorney, auctioneer, bagman, bailiff, broker, business, charge, clerk, commercial, commissary, commission, commissionaire, commissioner, committee, consignee, consul, corps, correspondent, curator, delegate, deputy, diplomat, diplomate, diplomatist, director, drummer, embassador, embassy, emissary, employe, envoy, factor, factotum, functionary, garnishee, go-between.