I'd say there were elections with even less inspiring candidates: 1968, 1988 and 2000 are all great examples.
Whoa whoa whoa whoa whoa whoa whoa. You can't call 1968 uninspiring. Two of the greatest candidates ever nominated by the Republicans and American Independents, respectively, were seen in this election. On one hand, you have Nixon's triumphant return to the arena, ready to take back what was rightfully his to begin with. On the other hand, you have George Wallace, one of the greatest defenders of liberty from that time period.