Adventure Time and Gravity Falls primarily
Also influential to different degrees were Rick and Morty, Bojack Horseman, Steven Universe, Gumball, Regular Show
Each of these you can see influences appearing in later cartoons, or people working on these shows going off to spread out and make more shows.
Overall I think it was a great decade for animation, better than the middle and late 2000s, 90s, 80s. Only the 1999-2004 era I think beats it and that may be nostalgia talking. These shows were experimental in storytelling and animation style and a lot of ground was broken, even if some of these shows went off the fucking rails and crashed and burned by the end