Thomas Jefferson was the famous anti-Federalist who later became President of the United States.
No US president was ever a king.
James Monroe who later became the 5th US president negotiated the Louisiana Purchase, along with Robert R. Livingston.
US Grant.
eisenhower
Ronald Reagan.
John Quincy Adams
Yes. William Henry Harrison's grandson, Benjamin Harrison was also a US president.
No signer of the US Constitution had a son who became President. Signers George Washington and John Madison later became Presidents.Two signers of the Declaration of Independence had sons who became President. John Adams (later the 2nd President) was the father of 6th President John Quincy Adams. Benjamin Harrison V was the father of William Henry Harrison, the 9th US President, who in turn was the grandfather of Benjamin's namesake, the 23rd US President.
General Dwight D. Eisenhower became president after WWII and was president of the US until the 1960's.
Robert E. Lee
Ulysses Grant became famous from the Civil War and was later elected President for two terms.
Obama did not start his career as a president. First he started as a hard working student, then he became a lawyer. Later on, he became Senator from Illinois; then he became the US president.