I found this recipe for Chef John's Macaroni and Cheese at AllRecipes.com.
I changed it up a bit by using several cheeses that I had on hand instead of just sharp Cheddar. I used Applewood Smoked Cheddar, Smoked Gouda, Mozzarella and Sharp Cheddar.
I also used shell shaped macaroni.
This was delicious and creamy, but not quite as cheesy as I would have liked it. Maybe next time I should stick with the recipe and use all Sharp Cheddar.