Preheat oven to 325°F and spray a 9x13-inch baking dish with cooking spray.
Spread the uncooked rice evenly across the bottom of the prepared baking dish.
In a medium bowl, whisk together the cream of mushroom soup, cream of chicken soup, water, and dry onion soup mix until smooth, then pour over the rice.
Arrange the chicken thighs skin-side up on top of the rice mixture and season with paprika, salt, and pepper.
Cover tightly with aluminum foil and bake for 2 hours and 30 minutes without opening the oven door.
Remove from oven, let stand for 5 minutes, then serve the chicken with the fluffy rice.