I’m as happy to bad-mouth JFK as the next guy, but you ignore his accomplishments. The Voting Rights Act, Civil Rights Act, War on Poverty, etc. may have been enacted under LBJ but it was JFK that provided the impetus. (It may not be clear how much of that was due to his charisma and inspiration while alive and how much was a reaction to — or apology for — his assassination.) Other JFK inspirations include the Peace Corps.
… And, most specially, his successful decision to send a man to the Moon within a decade and bring him safely back to Earth. I wrote about this before (although you’ll need to click to see the best parts in the quote box).
Also under-appreciated, apparently, is Harry Truman’s Marshall Plan — a combination of charity and self-interest that led to fast recovery from W.W. II and helped prevent W.W. III. Truman passed this program despite strong opposition.