The most important thing for you to understand is that I'm not a huge Elvis Presley fan. I respect what he accomplished. I think he was great at what he did. He recorded some songs I enjoy. But I would never identify myself as an Elvis "fan" the way I'm a fan of bands like Devo or Blue Oyster Cult.
Having SAID that...
A lot has been written about the imperfections of the current radio scene. To me, nothing speaks more to the uselessness of today's radio "formats" than the lack of Elvis Presley in what is labeled as "Classic Rock". Elvis has been called "The King of Rock 'n' Roll" longer than I've been alive. Yet, I've never, ever heard his music on a Classic Rock station. I suppose you COULD argue that Presley's truly iconic songs pre-date what is considered the "Classic Rock Era".
First, the "Classic Rock Era" is something invented by programmers, not a genuine movement. Any umbrella classification that covers the Moody Blues and Motley Crue equally, and counts them as part of the same thing is not something I can take even remotely seriously. Second, even if you consider Classic Rock a function of a certain period of time, Elvis still had plenty of fine songs during it. "Burning Love", anyone? "In The Ghetto"? "Kentucky Rain"? "Way Down"?
Some would charge that none of Presley's songs fit the Classic Rock mold. Maybe that's why they are omitted, but I still find it appalling. Classic Rock as it is currently defined encompasses heavy metal, psychedelic, glam, progressive, Southern rock, and dozens of quirky songs and genres. There is apparently plenty of room for all of this in Classic Rock.
But there's no place in Classic Rock for Elvis Presley.