Teppanyaki, in Japan at Epcot, is wonderful. Diners are seated at grill-top tables in groups of 8 and a chef comes out and prepares your meal in front of you. The food is excellent and really not exotic -- top quality steak, chicken, shrimp, scallops (your choice, or combos available) cooked up with fresh vegetables and noodles/rice. This is a fun place to eat with excellent food, IMHO.
If your family likes seafood, Coral Reef in Epcot is also a great choice -- a huge aquarium dominates the restaurant and the food is very good (and does include some non-seafood choices).