Preheat your oven to 375°F (190°C). Grease a 13x9-inch baking dish lightly and set aside. Cook the pasta until al dente according to the package directions, drain, and set aside.
Heat a drizzle of olive oil in a large skillet over medium heat. Add the chicken cubes and season with salt, pepper, and paprika. Cook until the chicken is lightly browned and fully cooked through, stirring occasionally. Remove the chicken from the skillet and set it aside.
Using the same skillet, melt the butter over medium heat. Once melted, sprinkle in the flour and whisk until it forms a paste (roux). Gradually add the milk while whisking continuously to avoid lumps. Stir in the ranch mix, garlic, and cream cheese until melted. Add 2 cups of shredded cheddar cheese and stir until smooth.
In a large mixing bowl, combine the cooked pasta, chicken, and cheese sauce. Stir until everything is evenly coated. Transfer the mixture into the prepared baking dish, spreading it out in an even layer.
Sprinkle the crumbled bacon and remaining cheddar cheese over the top. Bake uncovered for 20-30 minutes, or until the cheese is bubbly and slightly golden. Serve hot and enjoy!