Synonyms of middleperson

2 Syllables
maven, agent, fixer, judge, brokers, broker, holdout
3 Syllables
mediator, referee, umpire, stockbrokers, go-between, stockbroker, arbiter, arbiters
4 Syllables
negotiators, moderator, arbitrators, distributors, negotiator, distributor, intermedium, arbitrator
5 Syllables
adjudicator