Add Greek yogurt, mayonnaise, avocado, basil, parsley, dill, green onions, garlic, lemon juice, vinegar, salt, and pepper into a blender
Blend until smooth and creamy, adding a splash of water if needed for consistency
In a large bowl, combine shredded chicken, diced cucumber, and chopped red onion
Pour the green goddess dressing over the chicken mixture
Toss everything together until evenly coated
Taste and adjust seasoning with extra salt, pepper, or lemon juice if needed
Chill in the refrigerator for 20–30 minutes for best flavor
Serve cold with your favorite sides or wraps