Written and first recorded by Harry Nilsson (1967).
Hit album version by Blood, Sweat & Tears (1968).
Also recorded by Herb Alpert & The Tijuana Brass (1969), Harry Nilsson (remix 1971).
From the wiki: “‘Without Her’ was written by Harry Nilsson (‘Everybody’s Talkin’‘, ‘Without You‘) and appeared on his second album (his first for RCA Victor), Pandemonium Shadow Show, in 1967. The album proved to be the watershed of his career, attracting the attention of publicist Derek Taylor, who ordered a case of albums, sending them out to various industry people he believed would be interested, and The Beatles who invited Nilsson to London. (Nilsson covered ‘You Can’t Do That’ in an arrangement that quoted lyrics from more than 10 other Beatles songs. It became a Top 10 hit in Canada.)
“‘Without Her’ would be revamped for Nilsson’s 1971 ‘best-of’ album Aerial Pandemonium Ballet, one of the first ‘remix’ albums ever produced.