What effect could the following figures have had on history a life 20 years longer than they had?
Gustavus Adolphus II (age 37 at time of death, less than a month shy of his 38th birthday)[1]
Charles X Gustav of Sweden (age 37 at time of death)
Henry V of England (age 35 at time of death)
Richard I of England (age 41 at time of death)
William the Silent (age 51 at time of death)
William the Silent and Richard I are probably pushing the envelope of life spans in their respective eras, but, there were other figures of those eras that lived so long, so, what the hell?
You don't have to try and make a cohesive whole here, just tell me what you think each would or could have accomplished (or what the consequences would have been for other notable figures of the era/time frame of those 20 additional years) individually, and how they would have or could have changed the course of history had they lived an additional 20 years, with their OTL death (
and cause there of, ie; William the Silent and Richard I not shot at all, Henry V and Charles X Gustav don't contract the illnesses that killed them at all) as the POD.
[1] Added in edit. This one could be interesting as it could directly impact Charles X Gustav. Bonus points for scenarios where BOTH Gustavus Adolphus II AND Charles X Gustav get twenty extra years in the same TL.