Benny Goodman and Fats Waller were two of the most influential jazz musicians of the early 20th century. Goodman was a clarinetist and bandleader, while Waller was a pianist, organist, composer, and singer. Both men had a major impact on the development of jazz music, and their work is still celebrated today. Goodman was known as the 'King of Swing, ' while Waller was nicknamed 'The King of Stride Piano.'