Complex sentence: Erik LaRay Harvey is an American actor best known for his roles as Dunn Purnsley in "Boardwalk Empire" and Willis Stryker/Diamondback in "Luke Cage".
Split into simpler sentences: Erik LaRay Harvey is an American actor best known for his role as Dunn Purnsley in "Boardwalk Empire". In 2016, he appeared as Willis Stryker/Diamondback in "Luke Cage".