Sear the Chicken: Heat olive oil in a skillet over medium heat. Season the chicken breasts with salt, pepper, basil, and oregano. Sear the chicken for 2-3 minutes on each side until golden brown. Transfer to the Crockpot.
Make the Sauce: In the same skillet, sauté the minced garlic for 30 seconds. Add chicken broth and bring to a simmer, scraping up any brown bits. Stir in the heavy cream and grated parmesan cheese, allowing the cheese to melt into the sauce.
Combine in the Crockpot: Pour the garlic parmesan sauce over the chicken in the Crockpot. Cover and cook on low for 4-5 hours or high for 2-3 hours until the chicken is cooked through and tender.
Cook the Pasta: About 20 minutes before serving, cook the pasta according to the package directions. Drain and set aside.
Shred the Chicken: Remove the chicken from the Crockpot and shred it with two forks. Return the shredded chicken to the Crockpot and stir.
Mix with Pasta: Add the cooked pasta to the Crockpot and stir to combine. Let everything cook together for 5 minutes.
Finish and Serve: Stir in butter to make the dish extra creamy. Garnish with fresh parsley and serve hot with extra parmesan cheese, if desired.