21. John Quincy Adams
John Quincy Adams was the sixth president of the United States, serving from 1825 until 1829 and was the son of a president and Founding Father, John Adams. He ranks high for having a strong vision for the country and for his devotion to ensuring that all Americans were treated equally. Adams was vehemently anti-slavery. According to him, he was “the acutest, the astutest, the archest enemy of southern slavery that ever existed.” President Adams was also a big advocate of nonintervention policies, staying out of European politics. He was also against the annexation of Texas. Fun Fact: The oldest surviving photo of a president is of John Quincy Adams in 1843, when he was 76 years old.