General:
1789: George Washington
1792: George Washington
1796: John Adams
1800: John Adams
1804: Thomas Jefferson
1808: James Madison
1812: DeWitt Clinton
1816: James Monroe
1820: James Monroe
1824: Andrew Jackson
1828: Andrew Jackson
1832: Andrew Jackson
1836: Martin Van Buren
1840: Martin Van Buren
1844: James Polk
1848: Lewis Cass
1852: Franklin Pierce
1856: John Fremont
1860: Abe Lincoln
1864: Abe Lincoln
1868: Ulysses S. Grant
1872: Ulysses S. Grant
1876: Rutherford B. Hayes
1880: James A. Garfield
1884: James Blaine
1888: Benjamin Harrison
1892: James B. Weaver
1896: William J. Bryan
1900: William J. Bryan
1904: Theodore Roosevelt
1908: William Howard Taft (could have gone for Bryan but he was all washed up then)
1912: Theodore Roosevelt (could have gone Wilson although not with hindsight)
1916: Woodrow Wilson (very reluctantly but I like his economic policies)
1920: Eugene Debs
1924: Robert LaFollette
1928: Al Smith (meh neither candidate was good)
1932: FDR
1936: FDR
1940: FDR
1944: FDR
1948: Harry Truman
1952: Dwight Eisenhower
1956: Dwight D. Eisenhower
1960: JFK (meh)
1964: Lyndon B. Johnson
1968: Hubert Humphrey
1972: George McGovern
1976: Jimmy Carter
1980: Jimmy Carter
1984: Walter Mondale
1988: Michael Dukakis
1992: Bill Clinton (meh)
1996: Ralph Nader
2000: Al Gore
2004: John Kerry
2008: Barack Obama
2012: Barack Obama
2016: Hillary Clinton (meh)
Primaries:
1932: FDR
1952: Estes Kefauver
1956: Estes Kefauver
1960: Hubert Humphrey
1968: Eugene McCarthy
1972: George McGovern
1976: Frank Church (though Mo Udall was great)
1980: Ted Kennedy
1984: Gary Hart (meh)
1988: Jesse Jackson
1992: Tom Harkin
2000: Bill Bradley
2004: Howard Dean
2008: John Edwards (could have gone for like anyone that year)
2016: Bernie Sanders
Updated. Enthusiastic votes for Sanders, Dean, Bradley, Church, Humphrey, and Kefauver and in the GE, for Jackson, Lincoln, WJB twice, FDR after 1932, LBJ, Humphrey, and Obama in 2008.