How old are your kids? I think that makes a difference. I see you just posted 3 and 5, I'd skip Cali Grill and Jiko. Personally I'd focus on a WS country and really tour that pavilion and make an experience out of that and dining.
I would second an evening at AKL. So nice to tour the resort, see the animals and dine. We did that with our kids for a wonderful morning/breakfast at Boma and one trip we did it in the evening with friends then dined at Jiko.
Cali Grille is very expensive and a long dinner. I went with just my DH one trip, then finally last year we took our kids who were then 18 and 22 haha.
When younger my kids always really liked any of the sit down restaurants in Epcot WS (Morocco, Japan, Italy, UK, France or Mexico were the favs). They thought Whispering Canyon was a hoot, and loved Sci-Fi. But those two are not "fine dining".