Artists like Richard Harris

The Grass Roots are an American rock band that charted frequently between 1965 and 1975. The band was originally the creation of Lou Adler and songwriting duo P. F. Sloan and Steve Barri. In their career, they achieved two gold albums and two gold singles, and charted singles on the Billboard Hot 100 a total of 21 times. Among their charting singles, they achieved Top 10 three times, Top 20 six times and Top 40 14 times. They have sold over 20 million records worldwide.

The Walker Brothers were an American pop group formed in Los Angeles in 1964 by John Walker and Scott Walker, with Gary Walker joining shortly after. They adopted the name "Walker Brothers" as a show business touch, though they were unrelated. After moving to Britain in 1965, they achieved their breakthrough Top 20 single there with "Love Her", and went on have several UK Top 10 albums and Top 40 singles, including the No. 1 hits "Make It Easy on Yourself" and "The Sun Ain't Gonna Shine (Anymore)", both of which also made the US Top 20 and Canadian Top 2. Between them was the UK No. 3 hit "My Ship is Coming In". They provided a unique counterpoint to the British Invasion by achieving far more success in the UK than in their home country.

Francesco Stephen Castelluccio, better known by his stage name Frankie Valli, is an American singer and occasional actor, best known as the lead vocalist of the Four Seasons. He is known for his unusually powerful countertenor voice.

Billy Joe Thomas was an American singer widely known for his country, contemporary Christian, and pop hits of the 1960s, 1970s, and 1980s.

Manfred Mann was an English-based rock band formed in London in 1962. They were named after their keyboardist Manfred Mann. The group had two lead vocalists: Paul Jones from 1962 to 1966 and Mike d'Abo from 1966 to 1969. Other members of various group line-ups were Mike Hugg, Mike Vickers, Dave Richmond, Tom McGuinness, Jack Bruce, Lyn Dobson, Henry Lowther and Klaus Voormann.

Raymond Edward O'Sullivan, known professionally as Gilbert O'Sullivan, is an Irish singer-songwriter who achieved his most significant success during the early 1970s with hits including "Alone Again (Naturally)", "Clair" and "Get Down". His songs are often marked by his distinctive percussive piano playing style and observational lyrics using word play.

Gerard Hugh Sayer, known by his stage name Leo Sayer, is an English singer and songwriter who has been active since the early 1970s. He is best known for his 1978 Grammy Award-winning song "You Make Me Feel Like Dancing". He has been an Australian citizen since 2009, and lives in New South Wales.

Stanley Robert Vinton is a retired American singer and actor, who hosted his own self-titled TV show in the late 1970s. As a teen idol, he became known as "The Polish Prince", as his music paid tribute to his Polish heritage. One of his most popular songs is "Blue Velvet" which reached No. 1 on the Billboard Hot 100 in 1963, No. 1 in Canada, and number 2 in the UK in 1990.