This diagram displays all the shows whose creators originally worked on one of the other cartoons in the diagram, originating from The Marvelous Misadventures of Flapjack.
I was inspired to do this after seeing a comment about how J.G. Quintel, Pen Ward, and Alex Hirsch all worked together on Flapjack and then went on to make three of the most beloved shows of the 2010s: Regular Show, Adventure Time, and Gravity Falls respectively.
I’ve probably missed some other shows, so let me know! You could also take this back a lot further and add a bunch more cartoons, but things start to overlap and get complicated when you go back further than Flapjack.
EDIT: I’ve added Amphibia. Some of you are also saying I should add the DuckTales reboot but the lead developers of that show haven’t worked on anything else on the diagram so there’s nowhere to put it.