Crazy Ex-Girlfriend

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Total number of seasons: 4

The show does a great job in terms of creating complete character arcs and does not continue past a point where the creators rightfully decide that the story has been told. There are wonderful moments to be found in each season, and the acting and writing (including for music and lyrics) remains great throughout.

According to Den of Geek (warning: spoilers in the full article),

Originally developed for Showtime, the series was by no means a dud, garnering awards nominations, rave reviews, and devoted fans throughout its run. But network television isn’t always the most hospitable place for shows like these and a big part of its appeal, now that we’ve seen the recent season four finale, is that it is actually a complete story. […] Every character comes to some kind of resolution, in the sense that you know where they’re going, not that they’re finished with what came before.