if you’re considering video games, Metal Gear’s theme is an epic one! but I’m not getting my hopes up as this might not be too popular.
The Only Exception by paramore is good as well. Something from Vanessa Carlton would be nice – playing that famous and fast piano tune from A Thousand Miles in a Uke would be amazing.
of course, at some point you’re going to need to make a lesson for Jake’s While My Guitar Gently Weeps 🙂