Harvard. I can't see a single door shut in your face because of attending Harvard besides not being able to go for a DO residency.
And it depends on what aspects of the "osteopathic" education the OP was interested in in the first place, or if he was only applying to DO schools for his dad's sake. I think there's a lot of propoganda slung around by DO schools that ALL allopathic schools more or less ignore the "treat the person, not the symptom" thing. While that may be true at some, I know for a fact that not all MD schools are like that. I've also had a number of US-trained MD's tell me look at the big picture, never just treat a patients symptoms... look at the whole physical, mental and spiritual picture. That aspect, I believe, is not exclusive to DO schools like they want to make us believe.