Rock 'n' Rollers dig Elvis, don't get me wrong, but rock 'n' roll in the mid-to-late 50s threw up hundreds of heroes (some famous, some female, some barely known outside of their home town) and your average rock 'n' roller, from my constant reading of the subject, does seem to put Jerry Lee, Chuck Berry, Buddy, Larry Williams et al above, or at least on a par with, Elvis.
I'm not questioning his influence (it's HUGE) but, you know, I rarely listen to him, yet listen to rock 'n' roll (the proper 50s stuff, not the cliche) all the time.
It tends to be people who don't really listen much to rock 'n' roll who are the ones who have shrines of the fella in their front room, not the rockers!
They're also the people who tend to have no quality control in their love for the man, not really differentiating between the lean, hungry version (i.e. the only one that is really worth investigating) and the Vegas model or anything in-between.....see also Michael Jackson fans.