Sophocles was a prominent ancient Greek playwright and one of the most celebrated figures in the history of drama, known for his contributions to the genre of tragedy. He is best recognized for his plays such as 'Oedipus Rex' and 'Antigone,' which explore complex themes of fate, morality, and human suffering. Sophocles' innovative use of dramatic techniques, including the introduction of a third actor and the development of character depth, set new standards in theatrical storytelling.