Monologuist (noun)

1. A performer who delivers a monologue, a long speech by one person in a play or film.
2. A person who speaks at length about a particular subject or personal experience.

Origin:

From the word "mono-" meaning one and "logos" meaning speech or discourse.

Examples:

1. He was a monologuist who performed his stand-up comedy routine on stage.
2. She was a monologuist in the school play, delivering a powerful soliloquy.
3. The monologuist captivated the audience with her personal story.
4. He was known for his monologues in his one-man shows.
5. The monologuist had a unique style of storytelling that kept the audience engaged.