Who is the hero in Julius Caesar by Shakespeare?

Julius Caesar. His name alone summons up feelings of heroism, bravery, and tragedy. American Heritage dictionary states that a tragic hero is any man noted for feat of courage or nobility of purpose: especially, one who has risked or sacrificed his life. As the writing prompt asks who is the actual hero out of the play? And further more, who was the hero in the real-life history of Julius Caesar and the Roman Empire?
Several characters at first vie for the title of hero, including the namesake of the play, Caesar, himself. But could the hero be loyal best friend Marc Antony, the crafty…