In a large bowl, combine the olive oil, garlic powder, onion powder, dried thyme, dried rosemary, paprika, lemon zest, lemon juice, salt, and pepper to create a marinade.
Add the chicken thighs to the bowl, ensuring that they are well coated with the marinade. Let them marinate for at least 30 minutes (or up to overnight in the fridge for deeper flavor).
Arrange the marinated chicken thighs skin-side up on a baking sheet lined with parchment paper.
Roast in the preheated oven for 35-40 minutes, or until the skin is crispy and a meat thermometer inserted into the thickest part registers 165°F (75°C).
Once cooked, remove from the oven and let the chicken rest for 5 minutes before serving.
Garnish with freshly chopped parsley for a bright finish.