“Ernst Haefliger, a Swiss tenor who was most renowned as an interpreter of German art song and oratorio roles, died on Saturday in Davos, Switzerland, where he maintained a second home. He was 87 and lived in Vienna… Mr. Haefliger was a graceful singer with a flexible, lyrical voice that served him well in recitals — particularly in Schubert lieder — and made him an ideal Evangelist in Bach’s St. Matthew Passion.”