In a bowl, combine olive oil, garlic powder, paprika, salt, pepper, lemon juice, and oregano.
Place the chicken thighs in the marinade and coat well.
Cover and refrigerate for at least 30 minutes, or up to overnight.
Preheat the grill to medium-high heat.
Remove the chicken from the marinade and let excess drip off.
Place the thighs skin-side down on the grill.
Grill for 7-10 minutes until the skin is crispy and browned.
Flip the chicken and grill for an additional 10-15 minutes, until cooked through.
Remove from the grill and let rest for 5 minutes.
Garnish with fresh herbs and serve immediately.