Franklin Delano Roosevelt
Franklin Delano Roosevelt, also known as FDR, is the only U.S. president elected to more than two terms. As the 32nd President of the United States, he was a central figure in some of the key events of the mid-20th century, including the Great Depression and World War II. FDR was in college when his fifth cousin, Teddy (and fellow member of this list), became president. One of FDR's greener accomplishments was the creation of the Civilian Conservation Corps which provided work for millions of unemployed men who planted billions of trees, built hiking trails, cleaned up streams, and constructed more than 800 parks across the U.S., many which went on to become state parks.