Who was the most qualified person never to be elected President of the United States?

I would say Henry Clay. Ran for president 3 times, everytime didn’t win. But his credentials are massive.
-US Senator from Kentucky – served 4 different’ times for a total of 16 years.
-9th US Secretary of State under John Quincy Adams for 4 years
-7th Speaker of the US house of Representatives for a total of 10 years.
-Member of the US House of Representatives from Kentucky’s 2nd district, 7 years
-Member of the US House of Representatives from Kentucky’s 3rd district, 2 years
-Member of the US House of Representatives from Kentucky’s 5th district, 2 years

That’s ALOT of political experience.