Are you an actual professional pilot? Turn final without permission on an international airport like LAX??? 7600 to catch attention??
For f... sake!
Just a humble question, what would be YOUR solution to the presented problem? I've only flown into LAX in light twin-prop, but would be quite uncomfortable at any other place than on my extended center line. You are at the same altitude, same position as the B747 on the parallel runway, just displaced 0,5 nm laterally. And if you've flown in there, you know that sometimes you just have to wait for ATC to call you. No opportunity to pitch in!