Marco Beghelli
Marco Beghelli has been frequenting opera houses for half a century. Today, he is Professor of Musical Dramaturgy at the University of Bologna where he founded the "Archivio del Canto" in which books and documents on operatic singing and singers are collected: https://archiviodelcanto.dar.unibo.it/
Franz Liszt attempted practically every musical genre in vogue in the nineteenth century, although it is undeniable that a handful of the genres he only sampled (like string quartet) or adapted to his own temperament in original ways (like the symphony).