In a mixing bowl, combine shredded chicken, corn, black beans, salsa, taco seasoning, and cream cheese. Mix well until all ingredients are evenly distributed.
Stuff each Anaheim pepper half with the chicken mixture, ensuring it's generously filled.
Place the stuffed peppers in a baking dish, and sprinkle the tops with shredded cheddar cheese.
Bake in the preheated oven for 20 minutes, or until the peppers are tender and the cheese is bubbly and golden brown.
Garnish the baked stuffed peppers with chopped cilantro and a dollop of sour cream before serving.