Originally Posted by FriedEggs
Unfortunately, I don't know of any others, aside from Immortal Beloved (Beethoven) and Amadeus (Mozart).
There are a few composers who really lived spectacular lives while composing some really moving pieces: Wagner, Tchaikovsky, and Shostakovich come to mind for me...
There was a really good movie about Chopin that I saw a while back, I think it had Hugh Grant but it was pretty good.
Amadeus is honestly just another level of film making, it really is a rare and great film.
I am a big fan of Immortal Beloved also, which had great perfomances as well.