There were a lot of performers similar to Elvis.
But nobody was as good.
There may have been better musicians/guitarists who were technically superior to Elvis Lex
@The Prowler
However, it was his showmanship and stage presence which made him 'The King'.
And people can argue about who was the better musician, but Elvis was the most revolutionary Rock 'n Roll performer of hhis time.
Elvis was akin to his era how the Beatles were to the 1960s,
Both were the most revolutionary figures of popular music.
Arguing who was better or more influential is akin to comparing Bobby Orr to Wayne Gretzky.
Both Great performers who revolutionized 'the Game'.
Likewise, Elvis ad the Beatles are in that category of popular music too.