Bring a large pot of salted water to a boil. Cook the pasta according to package directions until al dente. Drain and set aside.
In a large skillet, cook chopped bacon over medium heat until crispy. Remove with a slotted spoon and drain on paper towels. Leave about 1 tablespoon of the bacon fat in the pan.
Season the diced chicken with a little salt and pepper. In the same skillet with bacon fat, add olive oil if needed. Cook the chicken over medium-high heat for 6–8 minutes or until fully cooked and lightly browned.
Reduce heat to medium. Add the heavy cream and chicken broth to the skillet. Stir in the ranch seasoning mix and bring to a gentle simmer. Cook for 2–3 minutes until slightly thickened.
Stir in the shredded cheddar cheese until melted and smooth. Return the cooked bacon and chicken to the skillet. Add the cooked pasta and toss everything together until evenly coated.
Serve hot, garnished with chopped parsley or green onions if desired.