Cook the pasta per the package directions in salted water until al dente. Drain well.
Season chicken with 1 tsp Cajun/Creole seasoning. In a large deep skillet or deep pot, cook seasoned chicken and sausage in a couple drizzles of olive oil over medium-high heat. Cook for 5 minutes or until chicken is browned and cooked through. Use a slotted spoon to remove from pot.
Add onion, pepper and celery to the drippings. Cook for 5 minutes until softened and beginning to brown. Add garlic cooking for 1-2 minutes longer.
Add half and half, tomatoes, 1 Tbsp Creole seasoning, lemon pepper to pot. Bring to a gentle simmer then mix in the Parmesan and cream cheese. Cook stirring until slightly thickened for about 2 minutes. Add more half and half to thin to your taste. Taste and add salt, if needed.
Add pasta, chicken and sausage back to the pot add 1 Tbsp parsley. Simmer just until heated through and combined. Mix well.
Serve immediately topped with parsley, diced tomato and a sprinkle of additional Parmesan, if desired.