Steak marinades

I prefer the dry rub too, garlic powder/onion powder, sea salt, peppercorn ground fresh if you can. I usually get my propane grill (I know, don't say it) as hot as I can and sear the juices in, will rotate the steak 90 degrees after two minutes if I want the criss cross lines. I cook to med rare and let the steak rest for 5-10 covered in aluminum foil. Yum!!! Oh yeah, and I do my final grill brush with a half an onion before throwing the steaks on, not sure how much that adds but like to do it anyway.