Which of the following poets was not a Harlem Renaissance poet?

From the poets listed in this instance, Archibald Lampman is the person who was not a Harlem Renaissance poet. Lampman was a Canadian poet. He has been described as 'the Canadian Keats', and he was seen as perhaps the most outstanding exponent of the Canadian school of nature poets. The Canadian Encyclopedia says that he is "generally considered the finest of Canada's late 19th century poets to write in English."

Langston Hughes, Countee Cullen, James Weldon Johnson, Claude McKay, and Arna Bontemps are members of the group of writers who are best known as Harlem Renaissance poets. They were part of the period of musical, literary, and cultural proliferation that began in New York City’s African American community during the 1920s and early 1930s. This movement was key to developing a new sense of Black (African-American) identity and aesthetics as writers, artists, and musicians.

The Harlem Renaissance articulated new ideas about the African-American experience; it experimented with artistic forms, modernist techniques, and the folk culture of African-Americans.