We miss Dmitri Hvorostovsky, the Siberian baritone with the silver mane who appeared when the world needed a Verdi baritone and proceeded to claim the mantle. Still in his prime, he announced in 2015 that he had been diagnosed with a brain tumor. Two years later, at 55, he was gone. Apart from Verdi, Hvorostovksy owned his countryman Tchaikovsky by birthright; the glamorous title role of Eugene Onegin in particular gave him dramatic and vocal opportunities to burn. And let’s not forget Dima’s chemistry with Renée Fleming as Tatyana, the country Cinderella who grows up to turn the tables on the conceited libertine who once threw her love away. —M.G.