In the bowl of a crockpot, combine cream cheese, 2 cups of cheddar cheese, buffalo sauce, ranch dressing, and the chicken breast.
Stir ingredients together until well blended.
Cook on high heat for 60-90 minutes, or until heated through and bubbly.
After a good stir, top with remaining cheddar cheese and put the lid back on the pot. Cook for an additional 10-15 minutes, until cheese is fully melted.
Finally, garnish with blue cheese crumbles and green onions. Serve with chips, toasted baguette, or raw vegetables.