IMO the ideal thing to do for hamburgers, mac and cheese, and grilled cheeses (the three foods that I would consider using American cheese for) is this:
Half american cheese for meltiness, half gruyere or other aged flavorful cheese for flavor.
A lot of modern recipes suggest that approach and it has worked well for me.
I’ve always thought it was weird how there are two media properties involving genderless gem people.
(the other is Land of the Lustrous)