Badfinger's (Peter Ham, Tom Evans, Mike Gibbins and Joey Molland) 1970 album "No Dice" contains "Without You" (Pete Ham - Tom Evans). Google the group for a tragic story.
(Harry) Nilsson's 1971 cover hit number one! Nilsson didn't tour on a regular basis or perform major concerts but he still found success. If possible please view the documentary "Who is Harry Nilsson (and why is everybody talkin' about him)?".
The Mariah Carey album "Music Box" features the 1994 hit cover. It was released just over a week after Nilsson died and peaked at number three. The album is one of the best selling of all time .... so far. Mariah married music executive, artist manager and label owner Tony Mottola in 1992, among the guests were Barbra Streisand, Ozzy Osbourne, Gloria Estefan and Billy Joel.