1896: Bryan (Quite obviously!)
1900: Bryan1904: Roosevelt1908: Bryan1912: Roosevelt1916: Wilson1920: Harding
1924: Coolidge
1928: Hoover1932: Roosevelt
1936: Roosevelt
1940: Roosevelt
1944: Roosevelt
1948: Truman (but I would have to say that it was a close call, much like the election itself.
)
1952: Eisenhower
1956: Eisenhower1960: Kennedy (again, a close call)
1964: Johnson (Goldwater was a great orator too, but Johnson won the hearts and minds of both history and the American people.)
1968: Nixon
1972: Nixon
1976: Ford (Carter was a decent speaker, but Ford had, in the words of the immortal Jenny Wakeman, "the skills to pay the bills.")
1980: Reagan
1984: Reagan
1988: Bush1992: Clinton (Same reason as with Johnson in '64)
1996: Clinton2000: Bush
2004: Bush2008: Obama
2012: Obama