I'm glad to see the Turf Club on your list. This is one of our favorites, and not many people have found it. We enjoy their dinner menu much better than the lunch menu, which is mostly sandwiches.
I can highly recommend Kouzinna by Cat Cora at the Boardwalk. Cat is of Greek heritage, but grew up in the deep south. The fuzion of the two make for a really neat menu. We ate there on our last trip and were absolutely thrilled by the meal we had. This location would be convenient to DHS, because the Boardwalk is just a boat ride away.
If you're a seafood fan, the Cape May Cafe at the Beach Club has a wonderful buffet. This is one of a few restaurants we try to get to on every trip. You can also get here from a boat at DHS.
Another hidden gem we came across on our last trip is the Maya Grill in Coronado Springs. They had a lot of selection on their menu and the portions where huge.
We also enjoy going to Boatrights at Port Orleans Riverside. They have a great prime rib.