English rock musician Greg Lake, the man responsible for pioneering the genre of progressive rock in the late 60’s and 70’s as a founding member of Emerson, Lake & Palmer, has passed away.

The singer, bassist, and songwriter was 69, and had fought a long with cancer according to his manager, Stewart Young.

Lake was best known for his keening tenor vocals on such ELP signature ’70s hits as “Lucky Man,” “From the Beginning” and his solo holiday perennial “I Believe in Father Christmas.”

His was the voice of the band that, along with Yes, helped establish the prog-rock genre of music that included Rush, Genesis, Gentle Giant and others that brought shining musical artistry and dance floor-defying song structures into the pop mainstream.