We like to go for the day on Christmas and usually go with what's available out of our list of favorites. I'm not sure exactly what you're looking for, but you might be interested in one of the Candlelight Processional packages in Epcot. You can expect all the parks and resorts to be crowded, but Epcot handles crowds better than the smaller parks. Reservations are still a good idea. We have been able to get seated without them in the past, but there's no guarantee.