I think the best options are Bistro Chez Remy and Walt's.
Bistro:
pros: awesome atmosphere, food is good, good friendly service, and it is close to the ride if you want to hop on before or after dinner(hop on with fast pass or single rider)
cons: a slightly limited menu
Walt's
Pros: good food, the rooms have cool themes and fun stuff to look at (rooms are themed to be a different land of the DL park), you can see Main Street while eating
Cons: the rooms in the restaurant were dirty, we were in the tomorrowland room and there was a layer of dust over everything and we sat next to the fireplace and there was a mousetrap in the fireplace in plain view, I'm just glad one of Mickey's friends wasn't in residence), our server wasn't very friendly either but not nasty or anything just not as happy in her work as other people we encountered
I think one of our best meals was at Buffalo Bill's but if you have limited time in the parks you might not want to invest in a dinner show but it was highly entertaining and the meal was good. My only complaint was that the chilli while it had good flavor had too many beans, but I am not a beans in my chilli fan.