Answer:
You can use this as your hook, if you'd like to:
There are many definitions of what a "hero" is to society, but is every hero the same? Is every hero actually heroic? The answer is actually a no, as Oedipus Rex is a tragic hero. Even though many people believe heroes are to fight off evil and do good, Oedipus is the opposite of that, and for multiple reasons.
I kind of wrote a whole introductory paragraph, sorry. And when you say "tragic hero", I took that as, like, an evil hero, so I'm dearly sorry if I took that the wrong way. If you need it to be fixed up or anything, just tell me and I'll fix it for you! ^^