Haranguer n. One who harangues, or is fond of haranguing; a declaimer. "With them join'd all th' haranguers of the throng, That thought to get preferment by the tongue."
... a debater than a business man. As a member of the White Hart evening club he was more often than any other the winner of the Headstrong Book—an old Greek Homer despatched the next morning to the most obstinate haranguer of the preceding night. It was at Lewes that Tom Paine's thoughts were first turned to the question of government. He used thus to tell the story. One evening after playing bowls, all the party retired to ... — Highways & Byways in Sussex • E.V. Lucas