The only "unfair" election is 1824, the only election in which the winner of the actual real system in which elects the president didn't win. Jackson should have won as he had the most electoral votes, but didn't. Every other election the candidate who won the electoral vote, therefore the way the election was decided, won the election and as per the rules of the election, was a fair election
"Fair" implies a normative assessment. Elections which are technically legitimate under an unfair system do not magically become fair. Also, by that argument, the electoral vote is irrelevant unless a candidate receives more than half, in which case whoever Congress votes for is 'fairly' elected.
