*Including Convention votes
1912: William Taft
1916: Elihu Root
1920: Frank Lowden
1924: Calvin Coolidge
1928: Calvin Coolidge (Draft Movement)
1932: John Nance Garner
1936: Robert Taft
1940: Robert Taft
1944: John Bricker
1948: Robert Taft
1952: Robert Taft
1956: John Bricker
1960: Richard Nixon
1964: Barry Goldwater
1968: Ronald Reagan
1972: John Hospers (L)
1976: Ronald Reagan
1980: Ronald Reagan
1984: Ronald Reagan
1988: Jack Kemp
1992: Pat Buchanan
1996: Pat Buchanan
2000: Steve Forbes
2004: Lincoln Chafee
2008: Ron Paul
2012: Ron Paul
2016: Rand Paul
With the exception of Chafee in 2004, I'd actually list most of those for you, too.