You have just one chance that I can see, and it's a long shot. SOMEHOW, you need to get a maxed-out charm spell and use it on him, talk to him, he'll forgive you if you somehow charm him up past 70%, and then get cured by him as fast as you can - he may attack when the charm wears off.
Of course, if you killed any of his daughters or Yagrum Bagarn, you're utterly screwed if on an XBox. There's no other way to get cured.