Add the chicken thighs to the bottom of the slow cooker.
Top the chicken with the drained beans, sun-dried tomatoes, diced onion, minced garlic, chicken broth, oregano, basil, salt, and black pepper.
Cover and cook on low for 6 to 7 hours or on high for 3 to 4 hours until the chicken is fully tender.
Remove the chicken from the slow cooker, shred it with two forks, and return the pieces to the pot.
Stir in the heavy cream and fresh spinach. Cover and cook on high for 15 to 20 minutes until the spinach wilts.
Ladle the stew into bowls and top each serving with grated Parmesan cheese.