Everyone has different tastes. Even my favorites have changed over the years or even from visit to visit. I eat at all of these regularly (only one I have not eaten at in past 12 months). For me, the current order is:
Flying Fish, Citricos, Jiko, Brown Derby, Ca Grill, Artist Point, Yachtsman and then Narcoosees.
IMO, the best restaurants are those not on the dining plan, V&A, bluezoo and Il Mulino. I've also loved Bistro de Paris but have not been this year and recent reports have said it's been noisy and become a family dining atmosphere over a fine dining atmosphere.