I think WDW is pretty good about not alienating anyone to far from familiar cuisine, It is likely that there is always at least one thing someone will like on every menu. Sadly, the Epcot restaurants take fewer chances than they once did representing dishes from other countries. So I think you will be ok on that score, don't stress to heavily. Rose and Crown in UK has a great menu that does a nice take on many everyday dishes ...fish and chips, chicken, sheppard's pie with lamb. I think it would be a hit with a "meat and potatoes" crew. The ambiance is nice especially on a nice late afternoon sitting on the patio and I've never had difficulty getting an ADR either, unlike Le Cellier, where you might find it difficult to procure one. Garden Grill is another good suggestion I've seen here...the food is hearty and pretty basic appealing to everyone. Restaurant Akershus is nice due to the Character interaction for your little ones...but the few times I have went, I found the food lacking and was always disappointed I think you are better served by going to a slightly nicer Character BLorD...Good Luck, and seriously, don't stress...there's something for everyone...!
