EPCOT- I would suggest trying some of the international fare like the Cantina or Tangerine Cafe (Morrocco). Almost every country has some type of CS.
AK- I highly reccomend the Flame Tree Barbecue. Barbecue there is great and it is a pretty good value. I also second the rec for Tusker House. Good quality but my family prefers the menu at Flame Tree barbecue.
MGM- I have never eaten at an MGM CS so I have no rec. But good luck and I hope you have good CS meals everywhere.