Answer:
Wolfgang Amadeus Mozart
Step-by-step explanation:
Mozart died at the age of 35, and yet he managed to compose more than 600 works. Many of those compositions are still considered to be the best in symphonic, concertante, chamber, operatic, and choral music.
Mozart is one of the most popular classical composers of all time, and his influence on Western music can't be overestimated.
By the way, Ludwig van Beethoven, who was Mozart's junior by fifteen years, was deeply influenced by his work.
We can only guess how many more wonderful pieces of music Mozart could have composed if he had lived a longer life.