Preheat oven to 400F. Place sweet potatoes on a large baking sheet and prick several times with a fork. Bake sweet potatoes at 400F 40-45 minutes until tender when pierced with a fork.
While sweet potatoes are baking, prepare the chicken: Pat chicken breasts dry with paper towels and season all over with salt and pepper to taste. Heat oil in a medium skillet over medium-high heat. Add chicken to pan and sear on both sides until golden-brown.
Reduce heat to medium and pour chicken broth into pan. Cover and let chicken simmer in broth 20 minutes until chicken registers 165F. Remove chicken from pan and place in a large bowl along with 2 tablespoons broth from pan. Use two forks to shred chicken.
Add barbecue sauce, chili powder, and paprika to chicken mixture (add a little more barbecue sauce if you like it saucier!) Keep chicken mixture warm.
Remove sweet potatoes from oven and use a fork and knife to split potato open and fluff up inside. Fill each sweet potato with barbecue chicken and top with cheddar cheese.
Broil sweet potatoes under high heat 2-3 minutes until cheese is melted and browned. Remove sweet potatoes from oven and top with red onion, cilantro, and pickled jalapenos. Serve hot and enjoy!