01 - Whisk olive oil, lemon juice, lemon zest, minced garlic, parsley, thyme, oregano, salt, and black pepper together in a large bowl.
02 - Add chicken thighs to the marinade, ensuring they are evenly coated. Cover and refrigerate for at least 1 hour, up to 8 hours for enhanced flavor.
03 - Heat grill to medium-high, approximately 400°F.
04 - Remove chicken from marinade and allow excess to drip off. Discard leftover marinade.
05 - Place chicken thighs on the grill and cook 6 to 8 minutes per side until grill marks appear and internal temperature reaches 165°F.
06 - Transfer chicken to a platter and let rest for 5 minutes. Garnish with lemon wedges and extra parsley if desired.