Place the chicken breasts, diced onion, minced garlic, chicken broth, buffalo sauce, paprika, 1 teaspoon of garlic powder, and 1/2 teaspoon of salt in a slow cooker. Stir to combine.
Cover and cook on high for 3 to 4 hours, or until the chicken reaches an internal temperature of 165°F (74°C) on a meat thermometer and shreds easily.
Preheat your oven to 400°F (200°C). Place the cubed sweet potatoes on a baking sheet. Drizzle with avocado oil and sprinkle with the remaining salt, pepper, and garlic powder. Toss to coat evenly.
Roast the sweet potatoes for 30 to 35 minutes, turning them halfway through, until they are tender and browned on the edges.
In a medium bowl, whisk together the mayonnaise, apple cider vinegar, sugar, salt, and pepper. Add the slaw mix and toss until the cabbage is evenly coated. Set aside in the refrigerator.
Remove the cooked chicken from the slow cooker and shred it using two forks. Return the shredded chicken to the warm buffalo sauce in the slow cooker and let it rest for 20 minutes to absorb the liquid.
Divide the roasted sweet potatoes, creamy slaw, and shredded buffalo chicken among four bowls. Garnish each bowl with crumbled blue cheese, green onions, and cilantro before serving.