I think Al Gore actually. It was peace and prosperity, he should have won in a landslide. It was a tough call between him and Clinton, but both made bone-headed mistakes and only one had a good environment for their candidacy.
Bush was a far better candidate than Trump though. Bush's favorability going into the 2000 election was like 58-37.
My list is:
1. Clinton
2. Trump
3. Romney
4. Gore
5. Kerry
6. Bush 04
7. Obama 12
8. Mccain 08 (this race was never close to winnable for R's vs Obama)
9. Bush 00
10. Obama 08