Place chicken in a 6-quart (or larger) slow cooker. Add the Italian seasoning, paprika, garlic powder, kosher salt, onion powder, and black pepper. Toss to coat the chicken in the seasoning.
Add the chicken broth, cover the slow cooker with a lid, and cook on HIGH for 1-2 hours or on LOW for 3-4 hours, until the chicken reaches an internal temperature of 165°F.
When the cooking time is almost done, boil the pasta on the stovetop according to the package directions for al dente. Drain.
Remove the chicken and shred with two forks. Return the chicken to the slow cooker and give everything a good stir.
Add the cream cheese to the slow cooker, stir, cover, and cook for an additional 5-10 minutes, or until the cream cheese melts and incorporates into the sauce.
Stir the cooked pasta into the chicken and sauce. Taste and season with additional salt and pepper, if desired. Top with grated Parmesan cheese and chopped fresh basil.