Preheat the oven to 350ºF (177ºC) and move the rack to the lower third of the oven. Generously butter or spray with nonstick cooking spray; set aside.
In a large mixing bowl combine Frank's Red Hot Original Sauce (2 tablespoons), garlic powder (1 tablespoon), black pepper (1 1/2 teaspoons), paprika (1 1/2 teaspoons), and salt (3/4 teaspoon).
Add chicken (2 pounds) to the hot sauce mixture. Marinate for 20-30 minutes.
While the chicken is marinating, cook the bacon (6 slices) in a 12-inch cast iron skillet, until crisp. Using a slotted spoon, remove the bacon to a paper towel-lined plate. Save 2 tablespoons of bacon drippings in the skillet.
Cook the pasta (8 ounces) in well-salted water, according to box instructions. Cook just until al dente. Drain. Do not rinse!
When the chicken is finished marinating, heat the skillet with bacon drippings. Using a slotted spoon, transfer the chicken cubes, shaking off as much marinade as possible, into heated bacon drippings, and brown on each side of the chicken. Cook for 3 to 4 minutes each side.
In a large mixing bowl, add remaining Frank's Red Hot sauce (2 tablespoons per your taste for spicy heat), Alfredo sauce (1 jar), ranch seasoning (1 packet), softened cream cheese (4 ounces), and Worcestershire sauce (1 teaspoon). Whisk until well combined, and cream cheese is mostly incorporated. It's okay if there are still a few cream cheese lumps.
Using a large rubber spatula, fold in drained pasta, cooked chicken, bacon, and onion (1/2 cup yellow) until evenly incorporated.
Pour the mixture into the prepared 9x13 casserole dish. Cover tightly with aluminum foil and bake in the preheated oven for 30 minutes. Remove from oven, remove foil, top with pepper jack cheese (1 1/2 cups), and continue to bake, uncovered, for about 12-15 minutes, until cheese is melted and is getting golden spots on the cheese.
Let cool for 10 minutes on a wire rack. Sprinkle top with green onions (1/3 cup) and serve!