BEST VIOLIN PIECES? Anyone?

I'm helping to put together a playlist for my brothers wedding.. his
fiancee is requesting only violin music, either a solo or duet or
quartet or anything! She asked NO symphonies because she wants CALM,
PEACEFUL music.

ANY SUGGESTIONS? I was thinking maybe some Joshua Bell, but I'd like
more suggestions.

YouTube videos or links would be helpful, but all answers are welcome.
THANK YOU SO MUCH! :) :)