Tragic Hero Foreseen

Shakespeare has a way of psyching people out to immediately refer to "No fear Shakespeare," but all in all, his tragedies are fairly similar and moderately comprehensible. The common thread I have found throughout the four Shakespearean tragedies I've read is the existance of a tragic hero. This hero always has a downfall which either leads him to death, betrayal, or emptiness. My hypothesis is Iago will successfully tear Desdemona and Othello apart (if this is entirely wrong it's because I haven't referred to outside sources yet!). Othello in my opinion is the tragic hero, designed to be much too trusting. His leaning on people's honesty to make his decisions for him may lead to his tragic downfall. Like Brutus in Julius Caesar, Othello possesses the mind of one who sees only others' opinions to justify his own.