Originally posted by Rank outsider
Paul Hindemith?
Jacopo Peri, one of history's most influential composers. His revolutionary score is not even extant, yet he changed music forever. He was looking to emulate Greek musical theater, looking backwards 2000 years+ and instead ushered in Opera. His masterwork, Dafne, composed in Florence in the late Renaissance circa 1597 influenced Monteverdi and many, many others. So much so many greats saw themselves as opera composers first, like Mozart.
"Jacopo Peri (20 August 1561 – 12 August 1633) was an Italian composer and singer of the transitional period between the Renaissance and Baroque styles, and is often called the inventor of opera. He wrote the first work to be called an opera today, Dafne (around 1597), and also the first opera to have survived to the present day, Euridice (1600)."
"In the 1590s, Peri became associated with Jacopo Corsi, the leading patron of music in Florence. They believed contemporary art was inferior to classical Greek and Roman works, and decided to attempt to recreate Greek tragedy, as they understood it. Their work added to that of the Florentine Camerata of the previous decade, which produced the first experiments in monody, the solo song style over continuo bass which eventually developed into recitative and aria. Peri and Corsi brought in the poet Ottavio Rinuccini to write a text, and the result, Dafne, though nowadays thought to be a long way from anything the Greeks would have recognised, is seen as the first work in a new form, opera." (last two paragraphs from Wiki)