In a large bowl, combine the shredded chicken, black beans, corn, red bell pepper, avocado, cherry tomatoes, red onion, and cilantro.
In a separate small bowl, whisk together the Greek yogurt, mayonnaise, lime juice, chili powder, cumin, salt, and pepper until smooth.
Pour the dressing over the chicken mixture and gently toss until everything is well coated.
Taste and adjust seasoning if necessary.
Chill the salad in the refrigerator for at least 30 minutes to allow the flavors to meld.
Serve chilled, either on its own or over a bed of greens.