If there were definitive proof of *any* of the hypotheses, there would be no discussion of any of it. For that to be the case, his body would have to be examined, and that’s probably a century or more away (pending abolition of the ceremonial monarchy). Even his burial spot was lost for 150 years (which is surprising, at least).
There are those who don’t want to believe he died of syphyllis, and considering the consanguinity of royal lines, the health problems that afflicted the Tudor line could have originated earlier. Of his known children, only three outlived him, and none of them produced offspring. Only Elizabeth appears to have been healthy enough to have children.
http://onthetudortrail.com/Blog/2012/09/17/henry-viiis-final-resting-place/
http://www.speroforum.com/a/kkftbfrvlg30/67748-A-macabre-tale-of-the-death-and-burial-of-Henry-VIII
http://www.elizabethfiles.com/the-bisley-boy/3255/
The Capetian dynasty had a lot of hereditary mental health issues, too..