Cook the pasta according to package instructions until al dente. Drain and set aside. In a large skillet, cook bacon over medium heat until crispy. Remove bacon, crumble, and set aside. Reserve 1 tablespoon bacon fat in skillet. Season chicken breasts with salt, pepper, onion powder, and Italian seasoning. In the same skillet with bacon fat, cook chicken until golden and cooked through, about 5-7 minutes per side. Remove and slice. In the same skillet, melt butter over medium heat. Add minced garlic and cook for 1 minute until fragrant. Whisk in flour and cook for 1-2 minutes to form a roux. Slowly whisk in half and half, stirring constantly until sauce thickens. Stir in shredded cheddar cheese and dry ranch seasoning mix until cheese is melted and sauce is smooth. Add cooked pasta, sliced chicken, and crumbled bacon to the sauce. Toss to combine and heat through. Adjust seasoning with salt and pepper to taste. Serve hot and enjoy your creamy chicken bacon ranch pasta.