The upcoming Hungarian election could be close. They run a kind of mixed member system somwhat akin to NZ , but the limits mean the spoiler effect is still a thing. In 2018 Victor Orban’s party got two thirds of the seats off 48% of the vote due to a splintered opposition.
Last year the six major opposition parties held a series of primaries to select a PM candidate and also constituency candidates (the first such primaries in Hungarian history), and will run under a single United for Hungary banner. Polling is close.