I guess that depends on what you mean by earn? Lisa did not really earn it, she inherited it. They guys who worked for him while he was alive-earned their keep in Elvis's eyes and were paid with salaries, trips, gifts of cars houses motorcycles etc....After he died the ones who wrote books, made videos, helped write books, screenplays, worked with tribute acts etc......they had the right to tell the story-it was their life also. That said ,
it would seem that a time might come when they have told their story sufficiently and have said all they wanted to say-31 years later that time evidently has yet to come. So money has most assuridly been made by most involved and still is being made.
I would not venture a guess as to who profited most-have no idea. But all have made some cash.
I guess I could rephrase the question and ask
"Who would Elvis feel, after all is said and done over the last 31 years, deserves to have profited the most?"