Harry Edward Nilsson III , usually credited as Nilsson, was an American singer-songwriter who achieved the peak of his commercial success in the early 1970s. He is known for the hit singles "Everybody's Talkin'" , "Without You" , and "Coconut" . Nilsson also wrote the song "One" made famous by the rock band Three Dog Night. He was one of the few major pop-rock recording artists of his era to achieve significant commercial success without ever performing major public concerts or undertaking regular tours.