Jake,
A wonderful picture. Of course you can clone away that corner in 10 seconds, but leaving it there adds a sense of truth and freshness. Some other options would be the cropping away of the top of the image. That would strengthen the picture for sure. However one would lose the spike of hair. If you need that, then I'd try cloning away the white area but then strengthening his lips to being our gaze back down again and provide balance.
Asher