I like Flapjack, hell I like Adventure Time as well, regardless of it being the second biggest offender. Out of that list I would say Regular Show, Flapjack and Adventure Time are really good, probably deserving of being heralded alongside their 90s-2000s brethren. Steven is another one that I am a little partial to. It is kinda like Sonic where it began really good to make it deserving of being a large icon of the medium, then went on to be a series of missed potential, yet still has tons there that show it has talent.
I never got into any of the Disney shows. Never understood the love for Gravity Falls or Star, and knowing the behind the scenes, I am okay with that.