Not really. Neither of those really tenderize.
The primary technique for tenderness is good marbling with proper cooking. The fat will help keep it moist, but braising can help with that issue.What you will need to do is consider first the grade of the meat. Can you at least get choice?
I'm sure we'll get some more help on methods so let's see what other ideas we have come in. When I get a chance, I'll add some more info.