T'Chaka

T'Chaka was the original Black Panther and king of Wakanda.

The Avengers: Earth's Mightiest Heroes
T'Chaka was the ruler of Wakanda until one night during a ceremony, M'Baku the Man-Ape arrived and challenged him to a duel. His son, T'Challa advised not accept, he instead decides to accepts the challenge. T'Chaka shows his skills and in a couple of moves manages to defeat M'Baku. However, M'Baku stands up and uses Klaw's Sonic Weapon to confuse T'Chaka and beat him to death. Despite his physical death, he stills lives in the memories of his son.

Trivia

 * In the comics, T'Chaka was killed by Ulysses Klaw.