Blair and Chuck - Gossip Girl. Ah yes, the extremely toxic power couple. Married and with a child at the end of the season finale. There’s no doubt that now, they would have their very own “Chair” Empire. Probably just like the Beckhams, they already had their eldest son, with two more to follow and a lovely little girl. They are most definitely doing well for themselves. Dan and Serena on the other hand, divorced then eloped in Vegas, now they’re divorcing again.
Jane and Rafael - Jane The Virgin. I imagine that they are living life happily with each other. Their son has probably grown up and provided a few grandchildren for them. Jane is still writing and Rafael is probably volunteering somewhere – as he retired at an early age. Oh, and Jane's half sister always visits and spends time with the pair. It’s all very wholesome, indeed.
Ezra Fitz and Aria Montgomery - Pretty Little Liars. This somewhat unsettling pair probably weren’t “end game", like Caleb and Hannah. Without a shadow of a doubt, five years into their marriage, Ezra cheats on Aria breaking her heart. But, like the strong woman she is, she files for divorce and finally gets her old school teacher out of her life. Ezra is miserable and received virtually nothing in the court case. Um yea, a bit of a sticky one.
This isn’t an exhaustive list, but if I went on any longer then it would very much start to feel like the awfully written reboot of the Gilmore Girls series. (And nobody deserved that).