I don't know who the great lawyers are, and I presume you can't get to them. I know of no case where it can be said for certain that they took part. They defend some people, but you can't get them to do that through your own efforts, they only defend the ones they want to defend. But I assume a case they take on must have progressed beyond the lower court. It's better not to think of them at all, otherwise you'll find the consultations with the other lawyers, their advice and their assistance, extremely disgusting and useless.