I've only bee to four of your options, but my impressions are as follows:
'Ohana- dinner - loved it. I understand that it's not as awesome as it used to be but if you've never been before, it's still pretty amazing. It was way to much food, but it was such a great experience and everything that we had was so so delicious! The course after course of food that was combined in daring and delicious ways that I never would have attempted along with service that was pretty darn excellent made me feel like we were on a cruise.
Beaches and Cream - I had the grilled cheese and tomato soup and I was actually not feeling like ice cream that night, so no sundae review here
. The food was good but not spectacular. I don't even remember what anyone else ate, but I do remember thinking that it seemed reasonably priced for Disney food and honestly, tomato soup and grilled cheese is a pretty tough-to-mess-up dinner, so it's kind of tough to judge the quality of their entire menu from my meal.
Whispering Canyon- lunch - The food here was fabulous. I think I had salmon and I don't remember what Benn had, but I do remember everything tasting amazing. I would definitely go back again. The only thing that I was a little bit disappointed in was that even though we turned our coaster to the green side, which is the cue to the server that you want to be included in the "fun", no one really interacted with us besides our server. I may be because the restaurant wasn't all that busy because our ADR was very early.
Chefs de France - I think the food here was probably very good, but unfortunately, we watched Impressiones de France right before our ADR. The film always makes me queasy, but eating right afterwards only intensified the problem, so I vaguely remember the food tasting good, but I remember feeling poorly more clearly. Benn really liked Chefs, but I haven't been able to convince myself to try it again.