Black Panther
T’Challa, the king of Wakanda who fights for justice under the alias of Black Panther made his debut in the Marvel Cinematic Universe with Captain America: Civil War. Its popularity led to a standalone movie and also to his appearance in Avengers: Infinity War and Avengers: Endgame. Actor Chadwick Boseman played Black Panther in all of the movies and you can easily see how he has changed over the years.
S.H.I.E.L.D. stands for Strategic Homeland Intervention, Enforcement, and Logistics Division,
not "Supreme Headquarters, International Espionage, Law-Enforcement Division" as is claimed here. Get it right, man...