Preheat your grill to high heat (around 450°F to 500°F). If using a grill pan, heat it over medium-high heat on the stove.
Pat the ribeye steaks dry with paper towels to achieve a good sear.
In a small bowl, mix together kosher salt, black pepper, garlic powder, onion powder, and smoked paprika.
Rub each ribeye steak with olive oil, coating them well, and sprinkle the spice mixture evenly over both sides of the steaks, pressing it into the meat.
Once the grill is ready, place the steaks on the grill grates and cook for about 4-5 minutes on one side without moving them to achieve grill marks.
Flip the steaks using tongs and grill for another 4-5 minutes on the other side for medium-rare. Use a meat thermometer to check the internal temperature, aiming for 130°F.
Remove the steaks from the grill and tent them with aluminum foil if desired. Let them rest for about 5 minutes to redistribute the juices.
Slice the steaks against the grain, garnish with fresh herbs if desired, and serve immediately.