I have eaten at all and my favorites in order are
Yachtsman - because I love steak! Best steak in WDW IMO.
California Grill - could easily beat out Yachtsman as my fav based on the view/fireworks, but again, I love steak!
Artist Point - lovely atmosphere, great food. Kind of tie with CG, but CG beats it because of the fireworks from the observation deck.
Narcoossee's - Nothing special, mediocre seafood (IMO), the best thing it has going is the outside deck and proximity to MK to view the fireworks.