Place chicken breasts in the crockpot.
Add chopped onion, garlic, chicken broth, great northern beans, diced green chilies, and drained corn.
Season with salt, black pepper, cumin, oregano, chili powder, and cayenne pepper.
Stir ingredients gently to combine.
Cover and cook on low for 6 to 8 hours or on high for 3 to 4 hours until chicken is tender.
Remove chicken breasts and shred with two forks, then return shredded chicken to the crockpot.
Stir in softened cream cheese and half-and-half cream until smooth and creamy.
Add chopped fresh cilantro and stir well.
Serve hot topped with sliced jalapeƱos, sliced avocados, a dollop of sour cream, extra chopped cilantro, tortilla strips, and grated Monterey Jack or Mexican cheese as desired.