Oedipus Essay Help

Our essay question is:

"Oedipus has been referred to as the classic tragic hero. Aristotle claimed that a classic tragic hero caused his own downfall, his fate was not deserved, his punishment exceeded the crime, he was of noble stature and had greatness. Discuss to what extent Oedipus is a classic tragic hero."

Any help, your own opinions or any other facts or ANYTHING at all would be greatly appreciated!! :D

Also in class we only read and analysed Oedipus Rex, would reading the rest of the trilogy be beneficial in relation to answering the essay question?

Thankyou all :)