Head over to the Polynesian resort and try Kona Cafe. You can hop the monorail if your at Magic Kingdom. I always do walk-ins there with no problem. Its worth the trip for the Tonga Toast, Pineapple macadamia nut pancakes (AMAZING!) and the Kailua pork eggs benedict. I also recommend their Lilikoi juice and their Fresh Kona Coffee Press. Check out my pictures and review here:
http://disneymommytips.blogspot.ca/2017/08/day-8.html
You can also try Crystal Palace in Magic Kingdom which has a pretty good Breakfast buffet or even Royal Table which we were able to snag last minute by walking up to the check in counter. They were able to fit us in.