That is technically incorrect.Hendrix is not a “one hit wonder.” He was an FM radio act - an album act, not a singles act. A one hit wonder is an artist who has only one song that people know.
That source did not say that.Hendrix released four studio albums and all four were Top 10 in the US and Electric Ladyland went to number 1. So your source saying that he “was not very popular” is idiotic. There was a big difference starting in the late 60s between album acts and singles acts.
That album had 3 or 4 big hits: although My Sharona has certainly outlived them all.My Sharona
The Knack