By 'great' I mean things like simply your favourite, or particularly fruitful or prolific, stuff like that (to get the semantic games out of the way, thank you).
Anwyay, give us the partnerships that you think gave us great music! Can be between a composer and a soloist, a lyricist, poet or impresario, anything like that.
Three of mine, which I might come back to elaborate on later:
- Brahms and the violinist Joseph Joachim - Lifelong friends and colleagues, this partnership produced things like Brahms' Violin Concerto, his Double Concerto and he consulted the Hungarian on string writing and technique when composing a number of his chamber works, masterpieces all.
- George Gershwin and his brother, lyricist Ira - making a huge chunk of what is called the 'Great American Songbook.'
- Stravinsky and the ballet impresario Sergei Diaghilev of the Ballets Russes - producing three ballets central to the 20th century repertoire. I don't even have to name them, you all know them!