Um, yes? I think the question you may be asking here is which African-American authors have contributed the aforementioned themes, issues and modes, so here's my abbreviated "top 5" list:
1. Alice Walker -- Her novel "The Color Purple" used both colloquy and other devices to best demonstrate the trials and triumphs of the African-American life.
2. Robert Hayden -- This relatively unpublicized poet of the Harlem Renaissance is best known for his work "Those Winter Sundays." The poem is comparable to Roethke's "My Papa's Waltz," as it deals with the relationship between father and son.
3. Langston Hughes -- He'll probably make everybody's list due to his significance, but no list of great authors would be complete without him. Whether we're talking about "The Weary Blues," "Harlem," or any one of his other pieces, Hughes sets the bar for fellow writers.
4. Maya Angelou -- Her books and poems made her the poet laureate, among other things. She also read at Clinton's inauguration, but turned down an invitation to do so at our current president's.
5. Toni Morrison -- "I Know Why the Caged Bird Sings." Enough said, right there. This novel by itself would put Morrison on the list, but her other works simply supplement her reputation.
Hope this little guide helps out a bit.