I like your arguments but disagree with a lot of what you say
There were actually very good reasons for everything which happened with his wives. England had been in a state of intermittent civil war for 200 years because of an unstable succession and he had a golden opportunity to end that if he had a son.
Well the unstable succession thing was partly due to the tudors having a very very dubious claim to the throne. Henry VII was the usurper and he ended the uncertainty when he had Arthur and then Henry. Henry VIII didn't have nearly the same succession problems - although he did get rid of many of the remaining heirs to the throne.
Katherine of Aragon wasn't going to have any more children and wanted her daughter to be Queen and marry Charles V so England became a satellite of Spain & the Holy Roman Empire which wasn't going to happen.
Well for years and years - I think 20 - Henry was happy in his marriage (if not faithful) and was happy with Mary as his successor especially considering he and not his wife would be choosing her groom. He only changed his mind when he met Anne Boleyn.
Anne Boleyn had 4 pregnancies and only one live child plus the validity of their marriage was in question (and so the legitimacy of any children in the succession) because it happened while K of A was alive so she had to be got rid of for a marriage which was unquestionably legitimate to someone who could bear children to secure the succession.
Anne Boleyn was doomed as soon as Katherine of Aragon died and she hadn't borne a son. Once she died, his second illegitimate marriage could be set aside and he was now a widower. the idea that he could legitimately kill a wife because he was worried about the legitimacy of their marriage is odd. And failure to bear a male child wasn't grounds for execution even in medieval europe.
I actually think Anne Boleyn is the one murder that could be attributed to Henry - he wanted her gone and I think it was rage because he had loved her and nothing good had come of it.
Jane Seymour died without being mistreated. Lucky for her
Anne of Cleves was delighted to be divorced and treated very well afterwards. Again, lucky for her
Katherine Howard had to be executed because she actually did what she was accused of.
Katherine Parr was a very young girl who hadn't passed off anyone else's child as the king child. There are loads of instances during that time period and earlier of wives being unfaithful and not being executed. The idea that she needed to be executed as a matter of law is weird. I suspect the story about hearing her cries might relate to the guilt he must have felt at imposing this fate on this young girl who had just caught his fancy.
Katherine Parr survived him and he actually tolerated a lot of dubious religious activity on her part which was technically treason.
Not tolerated. she just managed him and outlived him. It must have been a relief, especially since like all the wives from Jane Seymour on, they really had no choice but to say yes to that marriage proposal.
He was an old ogre, but he was also trying to secure peace, stability and continuity in England after a long period of destructive and destabilising wars.
No, he started off like that (or rather his father did) and for at least 20 years he ruled a stable England with his wife by his side and an heir, a daughter, to pass it all on to.
He ended up as a narcissist whose whims ruled England and ruined his wives' lives. Worst mid life crisis in the history of the world really.