What a great question and quite a tough one too!
I am going to cheat in a way but you did say I was on the Disney Dining Plan so I am going to assume I have 2 credits to use per day and am on the Deluxe plan as I am staying in a Deluxe hotel
Magic Kingdom - Be Our Guest for for dinner
Epcot - Le Cellier (2 credits)
Disney's Hollywood Studios - Sci-Fi Dine-In Theater Restaurant
Disney's Animal Kingdom - Yak & Yeti
Disney Springs - The BOATHOUSE (2 credits)
Free evening - back to Le Cellier (2 credits) and finish the trip with Illuminations: Reflections of Earth!
What would be your selection Wally?