Rub steak with oil, and set aside on the counter for about 1 hour. (Bringing the steak to room temperature decreases grilling time and encourages even cooking.) Preheat grill to medium-high.
Combine salt, pepper, herbs, and cayenne (if using); coat the steak generously with this dry rub.
Sear steak 4–5 minutes per side for medium rare. Allow the steak to rest 5–10 minutes before carving for peak juiciness.