Which notable American figure is associated with the Turtle Bay area?

The Turtle Bay area in Manhattan is notably associated with Stephen Sondheim, an influential American composer and lyricist known for his contributions to musical theater. Sondheim's works often explore complex themes and character development, making him a prominent figure in 20th-century American theatre.

His connection to Turtle Bay is particularly significant, as he spent a considerable amount of time in the neighborhood and created many of his masterpieces while living there. This connection to a vibrant cultural area in New York City enriches the historical and artistic significance of Turtle Bay, making Sondheim a fitting figure to highlight in relation to this locale.

When considering the other candidates, while they are all notable American literary figures, they do not share a direct or significant association with the Turtle Bay area in the same way that Sondheim does.