Not stock is correct. All aftermarket. Grant is the cheapest. That is the typical aftermarket wood steering wheel.
But you asked for the "best". Best is such an open statement. Best value, best quality, best looks, best?
Not cheap, but I like them,
www.Con2R.com makes some very nice wheels. I consider them the "best" for what I like. They do have wood options. Keep in mind they don't stock wheels, they make them to order. What they list isn't everything. Custom means custom, different finishes are always an option. Want a different species of wood over what's listed, they can do it.