The legendary comedian known for breaking down racial barriers in entertainment is Richard Pryor. His groundbreaking comedic style and candid discussions about race and societal issues changed the landscape of stand-up comedy. Pryor's bold approach challenged stereotypes and opened doors for future generations of African American comedians. His influential performances, including films like "Silver Streak", showcased his unique blend of humor and social commentary, addressing personal experiences with racism and inequality, making him a significant figure in American comedy history.