Colby Longhorn is good choice but you always have to have good guac, diced tomato, serrano and jalapeno peppers. For the protein, always go with fajita or brisket.
For the base, don’t screw around with Doritos or any national brand and don’t use thin chips. Thin chips break and you are jut going to have a mess at the table. Go with a thicker chip that is only salted and no flavors added.
If you must go with beans, use black beans.
And don’t go cheap on the salsa. Go to a good grocery and get a high end salsa that is made in Texas. Better yet, go with two or three salsas, a red, a green and a pico.
Bake very hot and eat fast, don’t let them sit around.
I like Lime Tostitos.