Layer the base: Add onion, garlic, bell pepper, jalapeño (if using), corn, black beans, and diced tomatoes to the crockpot.
Add the chicken and broth: Place chicken on top of the veggies. Pour in chicken broth.
Season well: Sprinkle in cumin, chili powder, smoked paprika, oregano, salt, and pepper.
Stir around the chicken to distribute the spices.
Cook low and slow: Cover and cook on Low for 6–7 hours or High for 3–4 hours, until the chicken shreds easily.
Shred the chicken: Remove chicken to a cutting board and shred with two forks. Return it to the crockpot.
Make it creamy: Stir in cream cheese (or heavy cream) and shredded cheese, if using. Cover and cook on Low for another 15–20 minutes, until smooth and melted.
Stir well.
Brighten it up: Add lime juice and adjust seasoning with more salt and pepper as needed.
Serve: Ladle into bowls and top with cilantro, avocado, tortilla strips, and a dollop of sour cream if you like.