7. John Adams
Source: Wikipedia.
John Adams was the second president from 1797 to 1801, after serving as the nation’s first vice president under George Washington. He had an IQ of 173, according to Simonton’s estimates.
Adams studied law at Harvard and was an early supporter of the movement for US independence from the British. Ambitious and intellectual — if not a little vain — he frequently complained to his wife that the office of Vice President was insignificant. He is perhaps best remembered for his skills in diplomacy, helping to negotiate a peace treaty during the Revolutionary War and avoiding a war with France during his Presidency.