Preheat the oven to 425°F (220°C). Allow chicken thighs to come to room temperature and pat dry.
In a small bowl, combine garlic powder, onion powder, paprika, oregano, thyme, kosher salt, and black pepper.
Place chicken in a large bowl, add olive oil and two-thirds of the seasoning mix, and coat thoroughly, including under the skin.
Arrange chicken on a baking rack over a baking sheet. Sprinkle remaining seasoning on top.
Bake for 35 to 40 minutes until internal temperature reaches 170°F.
Optional: Broil on high for 2-3 minutes to crisp the skin further.
Let rest for 5 minutes before serving.