Final answer:
Stokely Carmichael and Malcolm X most clearly articulated the Black Power movement through their advocacy for African American unity and self-reliance.
Step-by-step explanation:
Stokely Carmichael was one of the most famous advocates of the Black Power movement and is often credited with popularizing the term. Carmichael believed in African American unity as a political force and advocated for the creation of separate Black institutions.
He expelled White members from the Student Nonviolent Coordinating Committee (SNCC) and later joined the Black Panther Party. Another influential figure in the Black Power movement was Malcolm X, who called for self-reliance and equality through any means necessary.
While writers such as Langston Hughes, Zora Neale Hurston, and Claude McKay contributed to the movement through their works, Carmichael and Malcolm X most clearly articulated the principles of the Black Power movement.