Complex sentence: Among the other notable former directors and masters of the choir, who hold the title of "Informator Choristarum", are John Sheppard, Sir William McKie, Haldane Campbell Stewart and the composer Bill Ives, possibly better known as a former King's Singer.
Split into simpler sentences: Among the other notable former directors and masters of the choir, who hold the title of "Informator Choristarum", are John Sheppard, Sir William McKie and Haldane Campbell Stewart. The former Informator Choristarum was the composer Bill Ives, possibly better known as a former King's Singer.