It all depends on what your budget is/what type of food you like/whether you're looking for a restaurant in each Park, but these would be my top 5:
Yachtsman Steakhouse - it's expensive but the food is excellent and the service outstanding.
Yak & Yeti - for me this is the best restaurant in AK.
Teppan Edo - if you've never had a chance to do Japanese dining, this is a good experience and the food is very good.
Tutto Italia - I like Via Napoli as well, but this just edges it for me in terms of service and good quality.
Prime Time Cafe - this is all about the cast experience, but the food is American comfort and the portions are massive.
1F