Place the 1/4 cup cubed butter in the bottom of the crockpot. Arrange the 2 pounds boneless skinless chicken breasts on top of the butter.
Add 2/3 cup buffalo sauce, 2 cups chicken broth, 1/2 cup diced onion, the entire 14.5-ounce can fire roasted diced tomatoes, the drained 15-ounce can corn, and the two drained 15-ounce cans white beans to the crockpot.
Sprinkle in 1 teaspoon garlic powder, 1 teaspoon cumin, 1 teaspoon dill, 1 teaspoon oregano, 1 teaspoon paprika, 1 teaspoon salt, and 1/2 teaspoon pepper. Stir gently to combine so the spices are distributed and the chicken is partially submerged.
Cover the crockpot and cook on low for 5–6 hours or on high for 3–4 hours, until the chicken is cooked through (internal temperature 165°F or no pink in the center).
Remove the cooked chicken from the crockpot to a cutting board or plate and shred it with two forks.
Return the shredded chicken to the crockpot. Add the 8-ounce package cream cheese (room temperature); cut into chunks to help it melt more quickly, and stir to distribute.
Cover and cook on high for 8–10 minutes, stirring once or twice, until the cream cheese is fully melted and incorporated and the chili is smooth and heated through.
Stir once more, taste and adjust seasoning if desired, then serve the chili warm.