Wash the bell peppers, slice the tops off, and remove the seeds and membranes. Arrange them upright in a baking dish.
In a large mixing bowl, combine the shredded chicken, ranch dressing, corn, black beans, half of the cheddar cheese, garlic powder, onion powder, smoked paprika, salt, and pepper. Stir until all ingredients are well mixed.
Generously stuff each bell pepper with the ranch chicken mixture, packing it in well.
Top each stuffed pepper with the remaining cheddar cheese.
Cover the baking dish with aluminum foil and bake in the preheated oven for about 25 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the peppers are tender and the cheese is melted and bubbly.
Once done, remove the peppers from the oven and let them cool for a few minutes before serving.