List of Alternate Presidents

[Cryptic]

List I posted on alternatehistory.com. 

A 20th Century Cleveland
POD: Reagan dies in an accident in '79. Ford decides to enter the primaries and narrowly wins the nomination with the conservatives split between Bob Dole and John Connally.

1974-1977 Gerald Ford (Republican)
1977-1981 Jimmy Carter (Democratic)
1981-1985 Gerald Ford (Republican)
1985-1993 John Connally (Republican)
1993-2001 Mario Cuomo (Democratic) [1]
2001-2009 Tommy Thompson (Republican)
2009-Present Shannon O’Brien (Democratic) [2]

[1] First Italian-American President
[2] First Female President

[Cryptic]

Kerry in '04

44. John Kerry: 2005-2009
45. George Allen: 2009-2013
46. Barack Obama: 2013-2021

A short list, but I figured it becomes increasingly likely Presidents in the 2020's and on would be people we haven't heard of or who we wouldn't think of as likely candidates.  This is especially true as various House, Senate, and Governors elections have undoubtedly been different. 

[Cryptic]

Bush Replaces Agnew Instead of Ford

38. George H.W. Bush: 1974-1981 
39. John Glenn: 1981-1989
40. Jack Kemp: 1989-1993
41. Bill Bradley: 1993-2001
42. John McCain: 2001-2009
43. Russ Feingold: 2009-2017

[Cryptic]

Bill Clinton (D-AR) / Al Gore (D-TN) (1993-1997)
Bob Dole (R-KS) / Jack Kemp (R-NY) (1997-2001)
John Kerry (D-MA) / Dick Gephardt (D-MO) (2001-2009)
John McCain (R-AZ) / Tim Pawlenty (R-MN) (2009-2013)
Shannon O'Brian (D-MA) / Evan Bayh (D-IN) (2013-Present)