Well, that's good because this is not something I have said and it is not anything I would ever support.
My personal favorite is not Elvis, from that time period. My favorite, and I have his CDs in my Truck always, was Sam Cooke. I love his stuff. It might surprise to know that right this minute, I have Michael Jackson, Elvis, Sinatra and the Beatles in my truck right now. I like them all but I like Sam Cooke more then any of them.
To me, it's not about who was more talented. I've already said that I thought Jackson was more talented. It's about who really started it all. That's why I give it to Elvis. Your correct, there were great performers other then Elvis. Chuck Berry was terrific but Elvis opened the way because he was unique. He was white but had the ability to walk in both worlds. He brought something across the barrier that grew. Only he, or somebody like him, could do it. Of course, I don't believe that the world has ever seen another like him so you can make case that only Elvis could have done it, I don't know.