Place chicken breasts at the bottom of a 6-quart slow cooker.
Add diced onion, minced garlic, Great Northern beans, green chiles, frozen corn, cumin, oregano, chili powder, salt, and pepper.
Pour chicken broth over the ingredients until chicken is fully submerged.
Cover and cook on low heat for 6 hours or high heat for 3 hours.
Remove chicken to a separate bowl and shred using two forks.
Return shredded chicken to the slow cooker.
Add cubed cream cheese and stir until completely melted and the chili is creamy.
Incorporate fresh cilantro and serve hot.