+1 for both those suggestions! Harbor House is one of our favorite meals. And I love eating at Pinocchio sitting by the window and waving to people leaving on Its a Small World. Cosmic Rays is another good option because they have a large variety, and as far as portions go, they offer a few items that are huge. They have a chicken and ribs combo that can easily feed 2 people...
Also, don't forget to consider fighting the line for a Be Our Guest lunch. Everyone days the food is great.