Elvis Presley doesn't really need more compilations - either single discs or box sets - in his catalog, but RCA's 1999 triple-disc set Artist of the Century does wind up filling a need, of sorts. Over the course of 75 tracks, nearly all of Elvis' most popular songs are presented in their original hit versions. Given the number of hits he had, plus the high quality of his recordings in the late '50s and late '60s, there are inevitably big songs missing, but many of his very biggest are here, and the first two discs, in particular, are quite strong (the late-'60s/'70s selections slip somewhat, lacking such necessary items as "Kentucky Rain" and "Moody Blue"). So, this winds up being good one-stop shopping for those who just want one fairly comprehensive Elvis set in their library - although you should be forewarned that "fairly" is the key word in that statement, since this will not contain all the hits or necessary recordings.
A single-disc distillation of Sony Legacy's massive box set celebrating the 50th anniversary of Elvis Presley's '68 Comeback Special, this 2019 compilation covers ground that has been covered many times before. Back in 1968, RCA put out a soundtrack album to the special, and once the show entered in the realm of legend, it was repackaged on its anniversary three times over. All of this is a roundabout way of saying that The Best of the '68 Comeback contains a bunch of easily available material, yet none of the previous compilations assembled these tracks in precisely the same way (nor did they contain a new version of "If I Can Dream" plucked from NBC's anniversary special, a version distinguished by the presence of Shawn Mendes, Darius Rucker, Blake Shelton, Carrie Underwood, and Post Malone…not precisely a dream lineup for an Elvis fan).
Since The King of Rock 'n' Roll was the complete '50s masters, it was easy to assume that its five-disc '60s sequel, From Nashville to Memphis: The Essential 60's Masters, rounded up all the masters from that decade, which is simply not the case. The producers deliberately avoided the soundtracks to Elvis' movies, which perhaps makes sense, given that they are roundly and rightly disparaged as Presley's low point, which then opened the doors to presenting just what they judged as the best non-soundtrack recordings he made during the '60s. They also disregarded the gospel recordings, saving them for the double-disc 1994 collection Amazing Grace: His Greatest Gospel Songs, leaving this as an overview of the best of his pop and rock material of the '60s, all recorded after he got back from the army…