I like Both, Sinatra and Elvis are two of the greatest American icons in music.
Elvis is the bigger star he has been dead for over 35 years yet makes like millions a year and is consistently in the top 5 highest earning dead celebs.
Elvis earnings fluctuates, but he consistently earns over 20 million a year, in 2003 he earned 40 million and was the top earning, this year I think he is at 27 million.
Sinatra hasn't been on the highest earning consistently like Elvis, Elvis has been in the number 1 top earner since his death every single year until Micheal Jackson passed away and took the spot.