Cartoons such as Steven Universe, Gravity Falls, or Avatar?

What I love about these series is the overarching plot that isn't too obvious, lots of character growth, and a great mix of comedy and seriousness between episodes.

A show I tried that was advertised as similar was Star vs. the Forces of Evil that was a little too in your face with a lol random personality that I don't really click with.

No restrictions on time period, and feel free to suggest anime if it fits the bill, I just posted in TV as I these aren't anime and I don't have much experience in the area.