Who was the most famous jazz musican during the 1920s?

The most famous jazz musician during the 1920s was Louis Armstrong. Renowned for his innovative Trumpet playing and distinctive gravelly voice, Armstrong played a pivotal role in popularizing Jazz Music both in the United States and internationally. His performances and recordings, including hits like "What a Wonderful World" and "West End Blues," helped define the genre and influence countless musicians who followed. Armstrong's charisma and talent made him an iconic figure of the Jazz Age.