Preheat oven to 375F degrees. Place chicken into a baking dish and drizzle with olive oil. Season with salt and pepper. Roast for 25-30 minutes, until it reaches an internal temperature of 165F degrees.
Remove the chicken from the oven and reduce the oven temperature to 350F degrees.
Place the cooked chicken on a work surface and shred it with forks.
In a mixing bowl, combine the mayonnaise and ranch seasoning. Stir the shredded chicken into the ranch mayonnaise.
Line a baking sheet with parchment paper. Use a serrated knife to slice the sliders crosswise. Place the bottom half of the rolls onto the baking sheet.
Spread the chicken mixture evenly across the bottom half of the slider buns. Sprinkle the diced bacon evenly over the chicken mixture, followed by the grated cheddar cheese.
Place the top halves of the buns on top of the filling.
In a small microwave safe bowl, melt the butter. Stir the garlic powder into the melted butter. Use a pastry brush to coat the top of the rolls with the butter mixture.
Put the sliders in the oven for 15 minutes, until the tops are golden brown and cheese is melted. Cool for 5-10 minutes before slicing.