Great Plains is maybe the best cold pizza!Not saying it is good, but Pizza Ranch has a bacon cheeseburger pizza. Jeff's also offers one but I didn't see pickles on it.
We like Great Plains here, but it is best hot out of the oven. Sitting out at something like a Christmas party I can see where it wouldn't be great. It isn't a good cold pizza (but I don't like cold leftover pizza). We don't even like to get it delivered because the cheese starts to set up and just isn't the same at home.
We also like Vesuvius. But I am in the camp that there isn't one "best" pizza--every one has different tastes.