Choose something with a machiavellian-esque feel to it. Perhaps a novel or movie with a protagonist who is the archetypical villain who struggles within themselves. That's two power battles there.
I'd recommend King Richard III (the Shakespearian text). If you use this now, and enjoy it, you'll be miles ahead if your school chooses this as the Module A prescribed text.
Enjoy.
N.B. It's spelt 'regardless'.