Prepare the Marinade: In a mixing bowl, whisk together olive oil, lemon juice, vinegar, garlic, smoked paprika, sweet paprika, oregano, salt, pepper, and chili if desired.

Marinate the Chicken: Place chicken pieces in a large zip-top bag, pour in the marinade, and refrigerate for at least 4 hours or preferably overnight.

Preheat the Grill: Set grill to medium-high heat at about 400°F, preheat for 10-15 minutes.

Grill the Chicken: Grill skin-side down for 5-6 minutes, flip and continue for another 5-8 minutes, until internal temperature reaches 165°F.

Let it Rest: Transfer chicken to a plate, cover with foil, and let rest for 5 minutes.

Serve and Enjoy: Slice the chicken, garnish with lemon wedges and herbs, serve with salad or roasted potatoes.