4 cheese baked mac and cheese

Im making it as a side dish and would like to know what the best cheeses to use would be. I've made it a couple of times before using shard cheddar,smoked provolone,parmesan,and mozzarella. It came out really good,but looking to mix it up a little this time. I don't have a strong knowledge base on all the different cheeses out there so any suggestions would be great. It doesn't HAVE to be 4 cheeses,but atleast 2 cheeses that work well together. TIA