Preheat the oven to 425°F/220°C.
Pat the chicken dry. Season evenly with oil, salt, pepper, lemon pepper, paprika, garlic powder, onion powder, and thyme.
Lightly oil a roasting pan. Arrange the chicken in a single layer, skin-side up. Roast until juices run clear and the internal temperature reaches 165°F/74°C, about 30 minutes.
While the chicken roasts, combine garlic, butter, Parmesan, and parsley in a small bowl. Optional: Broil the chicken 2–3 minutes for extra-crispy skin, watching closely.
Remove the chicken from the oven and brush the garlic Parmesan mixture over each thigh. Serve immediately, spooning pan juices over the top.
Leftovers are excellent sliced over salads or tossed with pasta.