Yukon general election, 1992 Yuk 7, NDP 6, Lib 1, Ind 3
Yukon general election, 1989 NDP 9, PC 7
Yukon general election, 1985 NDP 8, PC 6, Lib 2
United Kingdom
FPTP
1974-1979 - third parties hold balance of power
United States
Due to the electoral college, elections where the electoral vote was decided by a large margin could easily be reversed by the shifting of swing states. The results ignore faithless electors.
The Florida debacle . The 537-vote Bush nailbiter would have given Gore a large victory if the victory was reversed. It is often stated that the Supreme Court case Bush v. Gore determined the election result, with Sandra Day O'Connor casting the deciding vote.
See also
The opposite of a result that is too close is one that is too lop-sided.