While it is a slogan, the saying that "Elvis did everything before anyone did anything" is pretty much true in terms of what we consider rock and roll. Elvis did owe a LOT to the black blues, jump and gospel singers and performers...but, everybody in "rock" does.
And hey, you think Green Day were the first rock and roll band to wear eyeliner? Think again. Elvis did it in the 1950s.
If you're reading this and you're young enough to have the attitude of, "yeah, Elvis, whatever" I would encourage you to listen two these three albums:
Yes, it is original rock...it ain't hip hop, funk or or death metal. But, it is the genesis. It moves, it swings, it dials up the outlaw and rebellious spirit.
Happy birthday Elvis, wherever you are.
Long live The King.