Prep the slow cooker. Lightly mist the insert with cooking spray. This helps with cleanup and prevents sticking.
Layer the base. Place chicken breasts in the slow cooker. Sprinkle the ranch seasoning, garlic powder, onion powder, and a few grinds of black pepper over the top.
Add liquids and dairy. Pour in the chicken broth.
Dot the chicken with the cubed cream cheese. Do not add the Greek yogurt yet—it goes in at the end to prevent curdling.
Cook low and slow. Cover and cook on Low for 4–5 hours or on High for 2.5–3 hours, until the chicken is very tender and easy to shred. Try not to lift the lid too often; it extends cooking time.
Shred the chicken. Remove the lid and shred the chicken directly in the pot using two forks.
Stir to melt the cream cheese into the cooking liquid. If it looks too thick, splash in a bit more broth. Too thin?
Let it simmer uncovered for 10–15 minutes to reduce.
Finish the sauce. Stir in the Greek yogurt until smooth and creamy. Add the shredded cheddar, crumbled bacon, and green onions. Taste and adjust seasoning with pepper or a pinch of salt if needed.
Optional veggies. Fold in peas or broccoli for color and fiber.
Let everything warm through for 5 minutes.
Serve your way. Spoon onto rice, cauliflower rice, baked potatoes, zucchini noodles, or into lettuce wraps. Garnish with extra green onions and bacon if you like.