He played the role on the 1984 concept album, and on stage in the 1986 world premiere West End production in London, as well as several times since.

[2] Following Tom & Mick & Maniacs' break-up in 1968, Körberg released his first solo album Nature Boy.

In 1995, he was invited as one of the seventeen Jean Valjeans from around the world to perform the encore of the Les Misérables 10th Anniversary Concert at the Royal Albert Hall in London.

In 2017, he appeared as a guest performer on the album "Worlds Collide" by Swedish metalcore band Dead By April, singing on the last song, "For Every Step".

In January and February 2025, he's set to return to Les Misérables in the Arena Spectacular World Tour as The Bishop of Digne opposite Peter Jöback as Valjean.

Körberg was nominated for a Laurence Olivier Award in the category Outstanding Performance by an Actor in a Musical, for his role in the 1986 world premiere of Chess.