Who is the man who sings the main songs in Les Miserables?

In the musical "Les Misérables," the character Jean Valjean, who is the protagonist, is often associated with the main songs, particularly "Bring Him Home." In various adaptations, this role has been played by several actors, with notable performances by Colm Wilkinson in the original cast and Hugh Jackman in the 2012 film adaptation. Other characters like Javert and Fantine also have significant songs, but Valjean is central to the musical's themes and music.