WI: King Henry VI was completely sane?

This is something I've been thinking about more and more over the last few weeks. Henry VI, like George III, had periods of insanity that led to the Duke of York being appointed as Lord Protector and eventually starting the War of the Roses. Now for the sake of argument, lets say that Henry VI never inherits his madness from his grandfather Charles VI and remains as stable as Henry IV and V. This is not to say he would automatically be a brilliant general or administrator, but at the very least it gives the King a fighting chance. So, with the King sane, and York never appointed Lord Protector, how would English history change? No war of the Roses? A stronger aristocracy vis a vis the English Crown? A possible continuation of the Hundred years war later down the road? Or would this make little difference in the long run?

The problems the English faced in the Hundred Years War will still be there, so they almost certainly still lose.

One interesting possibility is if a sane Henry is more willing to do his conjugal duty, and produces an heir earlier. The Beauforts and Yorkists will still have other disputes, but without the issue of the succession running around, it might not escalate as rapidly. Certainly York would be much less interested in claiming the throne if he hadn't spent the better part of a decade under the assumption that he would inherit.

Just a Rube said:

The problems the English faced in the Hundred Years War will still be there, so they almost certainly still lose.

One interesting possibility is if a sane Henry is more willing to do his conjugal duty, and produces an heir earlier. The Beauforts and Yorkists will still have other disputes, but without the issue of the succession running around, it might not escalate as rapidly. Certainly York would be much less interested in claiming the throne if he hadn't spent the better part of a decade under the assumption that he would inherit.

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Before his first catatonic episode, Henry VI had faced down and defeated a major popular rebellion (Cade's rebellion). Therefore, sane King Henry VI could have ruled somewhat effectively until he dies and passes the throne to his son Edward of Westminister (Edward IV in this timeline).