I would have actually said The Wave hands down.
Whispering Canyon is fine, but it's more about the antics. If you're not into that, the food itself is okay but nothing special. We've been a few times over the years and this past August, we all decided we were done for a while.
Ate dinner at Kona last year and it was meh. Wasn't bad, wasn't great. Seems like you're sitting out in the open in the lobby, kind of loud and distracting. Had heard wonderful things about it and just wasn't that impressed.
Had lunch at The Wave this past August and LOVED it. There's not a lot of theming or anything really special about the atmosphere. But it's quiet and relaxed. Perfect break from the parks. The food was amazing! Yes, two of us just had burgers--but they were the best burgers we've had in a LONG time! My oldest DS had a BLT--bacon, lobster, and tomato. It came out with these huge pieces of real lobster. He gobbled down every single bite. Husband has some sort of curry vegetable stew that he said was delicious. Desserts were great. Service was wonderful. Just really enjoyed everything about it. Feel like this is kind of a hidden gem that doesn't get as much press on the boards as some other restaurants. Definitely can't wait to go back and try dinner there!