A happy Henry VIII
Very possible that there is no English civil war, due to most of the country remaining catholic, meaning there is likely even less growth of parliament, also no glorious revolution, and perhaps no Stuarts
Quite plausible, and certainly no Stuarts would be a win for England! Though it's always possible that some descendant of Henry and Catherine also died childless leaving a Stuart as the best heir available
Though I think there would still have been religious tensions within England, as there was a growing Protestant community even before Henry broke with Rome. And possibly problems with the Scots unless something butterflied away their turn to Calvinism.
There's always the idea I've heard put forward, possibly in jest, by David Starkey. That Henry was a Romantic who simply wanted to marry Anne Boleyn for love and simply used the lack of a heir from Catherine as an excuse. IF true (i doubt it BTW) he would probably have found another excuse or maybe Catherine would have died "accidentally".
Which might have been better for England, or Roman Catholics anyway, as there'd have been no need then for the divorce and Break with Rome. A POD for another thread perhaps?