No other composer approaches his combination of productivity, quality and historical importance in these genres.
Mozart and Beethoven were both taught by him, and were greatly influenced by his music. But surprisingly, most people would not know much of his music.
I'm hoping to change this with The Haydn Pages. This is my effort to add a little about Joseph Haydn, because there is not a lot of information about him that is easily accessible.
As a student, I learnt his wonderful late Sonata in E Flat Major, Hob XVI:52, when I was studying for my licentiate diploma (L Mus A). This is the first movement, played by Bulgarian pianist, Ivaila Ivanova.