The legendary Greek figure known for his tragic downfall due to hubris is Oedipus. Renowned for his abilities as a king and a solver of riddles, Oedipus's pride leads him to defy prophecies regarding his fate. His quest for truth ultimately unravels his identity, revealing a shocking destiny of patricide and incest. His story, encapsulated in Sophocles’ play "Oedipus Rex," serves as a cautionary tale, illustrating the peril of excessive pride and the inexorable nature of fate.