Pitchman (noun)

A person who promotes or sells a product or service, especially in a public setting, by making a persuasive and enthusiastic sales pitch.

Origin:

From pitch + man.

Examples:

1. The pitchman at the carnival tried to convince everyone to play the ring toss game.
2. The talented pitchman sold vacuum cleaners door to door with his energetic sales pitch.
3. The charming pitchman had a way with words and could sell ice to an Eskimo.
4. The experienced pitchman knew exactly how to engage the crowd and get them to buy his product.
5. The best pitchman have the ability to make their product seem indispensable to their audience.