Harrison was always underated when he was alive and McCarney 'n'Lennon were both just screwed up enough to write some interesting music...together...whatever their relative merits after the Beatles, plus they nicked a lot of Chuck ("Rock'n'Roll who'syerdaddy") Berry riffs as pstring says - introducing Chuck(isms) to more people,worldwide,and notably - Europe.
Elvis had some great guitar players such as James Burton and Scotty Moore I defy you to think of Heartbreak Hotel and not remember that catchy solo..
Yes, Elvis was "Manufactured" as L says, but he did have the talent to go with it. I happen to like the 68 Comeback special..try and watch that to see some real ,soulful, music.
Accuracy,you say? hmm interesting concept..