Aside from gerald ford any other US president who served without being elected to office?

Nine Presidents died in office. William Henry Harrison, Zachary Taylor, Abraham Lincoln, James A. Garfield, William McKinley, Warren Harding, Franklin D. Roosevelt, and John F. Kennedy. So all the Vice Presidents who served under them became President without being elected. John Tyler, Millard Fillmore, Andrew Johnson, Chester A. Arthur, Theodore Roosevelt, Calvin Coolidge, Harry S. Truman, and Lyndon B. Johnson.