Add all of the ingredients, except the chicken, to a glass bowl with a lid or a gallon freezer bag or reusable silicone bag. Whisk or mix everything together then add the chicken and turn to coat it well if using a bowl or dish. Close the lid and shake well to coat if you're using a bag.
1/4 cup olive oil, 3 Tablespoons red wine vinegar, 3 cloves garlic, 2 Tablespoons honey, 2 Tablespoons lemon juice, 1 teaspoon EACH: dried oregano, dried basil, kosher salt, 1/4 teaspoon black pepper, 3 lbs boneless skinless chicken thighs
Marinate the chicken in the fridge for at least 30 minutes, or up to 12 hours. Do not exceed 24 hours. Turn the chicken occasionally to ensure each piece and each side of the chicken are evenly coated.
Preheat the grill to medium-high heat (400-450°F).
Remove the chicken from the marinade, shaking off any excess marinade, garlic, or herbs. Place the chicken thighs directly on the grill with the smooth side down. Close the lid and grill for 6-7 minutes on each side, or until the internal temperature of the chicken thighs reach just below 165°F with a meat thermometer. This allows for up to 5 degrees of carryover cooking while it rests.
Remove the chicken thighs to a clean plate or cutting board, cover lightly with foil, and rest for 5-10 minutes before serving to finish cooking and lock in the juices.