1. In a large bowl, combine the romaine lettuce, bacon, chicken breast, avocado, blue cheese, hard boiled eggs, red onion, and cucumber. Season with salt and pepper to taste.

2. In a separate bowl, whisk together the mayonnaise, sour cream, heavy cream, chives, parsley, dill, garlic powder, salt, and pepper until well combined.

3. Drizzle the ranch dressing over the salad and toss to coat evenly.

4. Serve immediately and enjoy your delicious keto Cobb salad with ranch dressing!