I like the idea of re-visiting Les Mis and here are a few more ideas –

Hello , Adele, arr. SATB Mac Huff

Stay with Me , Sam Smith, arr SATB Ton van Diepen

Your Love Keeps Lifting Me Higher, arr SATB Jay Althouse

Budapest, George Ezra, arr SATB Mac Huff

I’ll Be There, Michael Jackson, arr SATB Roger Emerson

True Colours, arr SATB Matthew Brown

When We Were Young, Adele, arr SATB Ed Lojeski

Don’t Stop Me Now, Queen, arr SATB Oliver Gies

A Thousand Years, Christina Perry, arr SATB Mac Huff

Mr Blue Sky, arr SSATB Pop4Vocals

Bohemian Rapsody, Queen, arr SATB Mark Brymer

Adiemus, Karl Jenkins

Libertango, Astor Piazzolla, arr SATB Kineret Erez ( Adventurous! Perhaps for the future)