I don't know if someone compiled a list here, but it really does depend on when you go, how many in your party, etc. I say that it a good idea to be prepared and if you don't feel like going, you can cancel very easily.
We have gotten into restaurants at the last second because of someone else's cancellation, so you never want to give up.
BUT, IMHO, I would say (based on experience):
ALL signature restaurants
Chef Mickey's
Cinderella's Castle
Le Cellier
The Bistro
Rose and Crown (for dinner b/c of fireworks view)
LTT (but only on party night like MNNSHP)