1) Confidence man 2) Egger-on 3) Elbow to the ribs 4) Encouraging sort 5) Exhorter 6) Exhorting individual 7) His forte is to exhort 8) Insistent one 9) Insistent pusher 10) Lobbyist 11) One prodding 12) One seeking to persuade 13) One who encourages 14) One who exhorts 15) One who pleads 16) One who prods 
see coat-tugger.
[canal tugboat] Urger, originally named H.J. Dornbos, is a historic canal tugboat located at Waterford in Saratoga County, New York. She was built in 1901 by Johnson Brothers Shipyard and Boiler Works of Ferrysburg, Michigan. She was purchased for service on the New York State Barge Canal system in 1922 and was in regular use until the 1980...
• (n.) One who urges.
Urger is Australian slang for a person who is unwilling to take risks, speculate, etc., on his own account, especially one who encourages others to do so.
see coat-tugger.
a person or thing that urges. · · a horse-racing tipster; tout. · a person who takes advantage of others; confidence man.