United Kingdom: “Hold my beer”
A parliamentary system may still be subject to “peculiarities". Labour just won a “landslide" with more than double the majority of the previous government but with a significantly smaller percentage of the vote (https://en.wikipedia.org/wiki/List_of_United_Kingdom_general_elections#21st_century).
For the US *Presidency* (as long as there is one), IMHO there should be universal suffrage with some form of ranked voting.