Preheat oven to 400 degrees F. Spray 9x13-inch pan (or other 3 quart pan) with nonstick cooking spray. Add potatoes to pan. In a small bowl add butter, paprika, garlic powder, salt, and pepper. Stir until combined. Pour butter mixture over potatoes and toss until potatoes are evenly coated. Cook potatoes for 45-50 minutes, or until fork-tender.
WHILE POTATOES ARE IN OVEN: Cut bacon into 1-inch pieces. Cook in large skillet over medium heat until done, about 6-8 minutes, stirring occasionally. Drain on paper towel-lined plate. Leave all but 1 tablespoon of bacon grease in skillet. Cook chicken pieces on medium heat until fully cooked, about 8 minutes.
Remove potatoes from oven, and turn off oven. Sprinkle 1 cup cheese evenly over potatoes. Then layer chicken, bacon, and green onions on top. Sprinkle remaining cheese and return to oven for 3-5 minutes, or until the cheese melts. Serve with sour cream and green onion.