The verse vocal melody to Leo Sayer's signature 70s soft rock ballad, When I Need Love (released February 1977) bears a strong resemblance to the chorus vocal melody to Leonard Cohen's folk song Famous Blue Raincoat (released 1971). The intro/outro vocal melody to Elton John and Gary Osborne's pop hit Little Jeannie (released May 1,1980) also seems to take inspiration from Famous Blue Raincoat (i.e "You stepped into my life from a bad dream [...]"). Thanks to Ian R. (@77BlueJays) for suggesting this comparison!
When I Need Someone (:14) VS Famous Blue Raincoat (1:01)
Singer-songwriter Dan Fogelberg's hit Heart Hotels (released 1980) seems to borrow it's verse vocal melody and piano intro/arrangement from America's hit Daisy Jane (released July, 1975). Oh, and Daisy Jane was from America's album Hearts.
“He’s So Fine” recorded by the Chiffons in 1962, George Harrison’s ‘My Sweet Lord’ was released January 15, 1971. On February 10th, 1971, A suit was filed against George Harrison inclusive of his English and American companies. The suite also included Apple Records, BMI and Hansen Publications. He was found guilty of ‘subconscious plagiarism’ and a judgment was filed against him in the amount of $587,000.00 of which the full amount was paid and the judgment dismissed in 1981