Remember that video I found of Tony playing clarinet? Well I found another one of Hawkeye playing violin:
[link] At 1:04 he's behind the pianist, Lang Lang, nodding his head to the music.
So I have a commission for you: I want you to paint The Avengers playing Mozart's Clarinet Quintet. I don't care who you fill in on second violin, viola, and cello, but I want to see Tony playing clarinet and Clint playing violin.
I'll make it worth your while...
My suggestion for cello would be Bruce though, with Thor on viola and Captain America or Black Widow on second violin.
I dare you.