Choose a movie: a drama or adventure, not a comedy. Reflect on why it works so well.
Analyze Sophocles' Antigone in the same way. By doing so, you will figure out who the tragic hero is. Remember, the tragic hero is the ONE CHARACTER who has the climactic reversal and recognition, the one upon whose change in fortune the play focuses. It will be a good, not perfect, person, whose change in fortune is caused "not by vice or depravity, but by some error in judgment" (that is, hamartia).