The best Metroidvanias to play right now

What are the best Metroidvania games? Nintendo's Super Metroid and Konami's Castlevania: Symphony of the Night popularized the Metroidvania, but the genre has come into its own since these inaugural titles.
While many of the best Metroidvanias try to recapture the spirit of their forebears, others expand into new territories by incorporating mechanics from RPGs, soulslikes, and even pinball. The result is a dynamic genre offering a wealth of familiar and fresh experiences - some recent, many of them cheap, and a few of them some of the best PC games ever made.
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