It's kind of a strait line from Steven Universe to Craig of the Creek. Same production company and venue (Cartoon Network/Warner Bros.). The creators, Matt Burnett and Ben Levin, were both writers on SU. Directors Stu Livingston and Tiffany Ford worked on SU, as did executive producers Curtis Lelash, Jennifer Pelphrey, Tramm Wigzell, Rob Sorcher, and Brian Miller. I'm too lazy to go through the writer's list right now because it's a long list (103 episodes?).
Oddly, the art director, Martin Ansolabehere, doesn't seem to have worked on Steven Universe, but he's certainly been around the same block the others have- Warner Bros/DC/Cartoon Network and Nickelodeon credits going back to the mid nineties. Powerpuff Girls, Foster's Home for Imaginary Friends, Rocko's Modern Life, The Critic (?!). He's done a lot of character design, background design and painting, and color keys (these are usually color storyboards, depends on the production).
No one credited with character design pops out at me, so I am assuming that most of it was done by Matt Burnett, Ben Levin, and Shauna McGarry (credited with developing the series on Wikipedia, but as creator on IMDB), and Martin Ansolabehere. Shauna McGarry majored in film production (expected for this industry) and minored in gender studies (????), but does not seem to have worked on Steven Universe.
A lot of people seem to have also work on Adventure Time, even if they didn't work on Steven Universe. My Little Pony and Apple and Onion popped up a lot too. That's not surprising since AT was also produced at Cartoon Network. No idea about MLP (Seems to be Hasbro has an in house production studio?). Don't care enough to look into Apple and Onion.
It would probably be interesting to see a kind of relationship map between people working in the animation industry, shows, and production companies. Creators, writers, producers, and directors might be the most strongly correlated with art style and content. College might be something to add in, but I'm not convinced CalArts is as influential as you guys are. Social media and fandoms are crazy good at spreading style and 'culture', and at policing them.
ETA- I remembered why Ansolabehere's credit on The Critic stuck out to me- It's Film Roman. Almost everything else that came up while peeking through credits was WB/CN with some DC and MLP sprinkled in.
