In a small bowl, combine the softened butter, minced garlic, fresh parsley, and fresh thyme. Mix thoroughly and set aside.
Pat the ribeye steaks completely dry using paper towels. Season both sides generously with kosher salt and freshly ground black pepper.
Let the seasoned steaks rest at room temperature for 30 minutes to ensure even cooking.
Preheat a grill or a heavy cast-iron skillet over high heat. Add the avocado oil to the skillet or brush it onto the grill grates.
Place the steaks on the hot surface and cook for 4 to 5 minutes undisturbed to develop a rich, brown crust.
Flip the steaks and immediately top each one with a generous dollop of the prepared herbed garlic butter.
Cook for an additional 4 to 5 minutes, continuously basting the steaks with the melting butter, until the internal temperature reaches 130°F for medium-rare.
Transfer the steaks to a cutting board, tent loosely with aluminum foil, and let them rest for 5 to 10 minutes.
Slice against the grain and serve immediately, pouring any remaining melted garlic butter from the pan over the top.