Arrange the remaining herbs, onion, carrots, and potatoes in the bottom of the baking dish. Add the olive oil and toss the veggies in it. Sprinkle with more of the salt and pepper and toss again.
Place the prepared chicken on top of the vegetables, breast side up.
Pour the melted butter over the chicken, then sprinkle with salt and pepper.
Bake uncovered for 1 1/2 hours. If your chicken is larger or smaller, you can adjust the time.
Remove the chicken from the oven and transfer it to a plate. Wrap loosely in foil and let rest for 15 minutes.
Check the doneness of the chicken. The temperature in the thickest part should be 165° F. Another way to check is that the juices between the leg and thigh will run clear when pierced.
Serve sliced chicken with some of the veggies.