Layer the base: Place chicken breasts in the bottom of the slow cooker. Sprinkle ranch seasoning, pepper, and any optional spices over the top.
Pour in the chicken broth.
Add cream cheese: Scatter cream cheese chunks over the chicken so they melt evenly.
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 tender and easily shreds.
Shred the chicken: Remove the chicken to a cutting board and shred with two forks. Return the shredded chicken to the slow cooker and stir to combine with the creamy sauce.
Stir in cheese: Add shredded cheddar and half the crumbled bacon. Stir until the cheese melts and the mixture is smooth and creamy.
If it seems too thick, add a splash more broth.
Finish and garnish: Taste and adjust seasoning. Top with remaining bacon and sliced green onions.
Serve: Spoon onto buns, pile over rice or pasta, or stuff into baked potatoes. Add extra green onions or a drizzle of ranch if you like.