^^^^^^
1924 had indisputably the worst two major party candidates of all time - luckily it had one of the greatest third party campaigns in history too.
In ranking (from 1 to 10):
2004: D 0 R -100000
2000: D 5 R -1000
1996: D 5 R 2
1992: D 6 R -100
1988: D 4 R -100
1984: D 0 R -10000*10^12^26
1980: D 1 R -100000
1976: D 4 R 2
1972: D 8 R -100000000000*10^64
1968: What Tweed Said. D -1000000 R -100000000000000000000 I -10*10^14
1964: D 3 R 0
1960: D 5 R Nixon points
1956: D 3 R 1
1952: D 5 R 5
1948: D 3 R 3
1944: D 6 R 4
1940: D 5 R 5
1936: D 6 R 0
1932: D 4 R 0
1928: D 0 R 4
1924: D -1000000000*25 R -100 P 8
1920: D 0 R 3
1916: D -1000000000*25 R 4
1912: D 5 R 5 P 5
1908: D 5 R 5
1904: D 6 R 5
1900: D 5 R -10000000*10^77
1896: D 6 R 4
Don't bothered to go beyond that to be honest.. though I assume by now it's quite clear where my bias is.