Ambassadors? Emissaries? Peacekeepers?

Hmm--I took emissaries to a thesaurus (M-W On-line), was referred to ambassador, and found this; perhaps one will strike a chord with you:
Entry Word: ambassador
Function: noun

Text: a person sent on a mission to represent another <a beloved entertainer who has often been sent abroad by the president as his country's goodwill ambassador>

Synonyms delegate, emissary, envoy, minister, legate, representative

Related Words agent, attaché, consul, deputy, diplomat, foreign minister, nuncio, procurator, proxy; apostle, evangelist, missionary; deputation, detachment, legation; courier, messenger; mouthpiece, spokesperson