If you haven’t played Inscryption, just ignore everything else and do that first. It’s the most innovative deckbuilding game I’ve played, but saying more would spoil it.
Ascension is a short-ish one I’ve sunk a lot of hours into. It’s sort of like dominion meets Magic. The expansions make it a lot more interesting, but the full package is pretty cheap. It was designed by an MTG pro player who was sick of exactly that.
Black book is excellent, and managers to put a compelling narrative spin on a TCG.
Monster train is a good “it’s like slay the spire, but not slay the spire” option for when you just can’t look at another shiv.