Definately BG; you may have to share a table, but it’s a buffet, not “family dining” (where they bring platters to the table and everyone helps themselves). Very authentic German food and a very good show. Kids might enjoy San Angel Inn, especially if you get can get a table by the water. Adults can get a margarita from La Cava while you’re there. Teppan Edo is decent food and the “show” of making it is entertaining (although probably no better than a teppanyaki reataurant you may have in your home town).
50s PT in DHS can be a lot of fun, even if the nostalgia may be lost on the kids. Excellent fried chicken (and I live in the South). Y&Y at AK has good food and is very nicely decorated. The seared ahi salad is one of my favorite meals in WDW.
Sanaa at Kidani in AKL is one of my favorite TSs in WDW. Excellent food and fun to watch the animals while you eat. I prefer lunch due to daylight considerations. Boma (Jambo House) is also good; HUGE buffet with everthing from semi-authentic African dishes to chicken nuggets. Personally I like Sanaa much better, but I’m generally NOT a buffet person.
Raglan Road in DTD is another of my favorites; everything from “pub grub” to steaks/chops/seafood, large beer and whiskey selections, and great music/singing/dancing in the evenings.
There are others, but these come to the top of my list…