Arrange the 8 whole bacon slices on a broiler pan and bake at 375 degrees until crisp, 10 to 12 minutes.
Meanwhile, preheat a cast-iron skillet or griddle over medium-high heat. Combine the beef, chopped bacon, grated onion, garlic, chipotle puree and worcestershire; season with salt and pepper. Forme into 4 patties (thinner at the center); drizzle with oil. Grill the burgers for 5 minutes on each side for medium.
Make the queso sauce; in a medium saucepan, melt the butter over medium heat. Whisk in the flour for 1 minute, then whisk in the milk. Stir in the cheese to melt. Stir in the tomatoes.
Buns & Toppings
Place the burgers on the bun bottoms and top with the queso sauce, criss-crossed bacon strips, corn chips, remaining toppings and bun tops. Serve extra sauce on the side.