Elegant, dignified, beautiful, at times sorrowful, at times joyful, at times tragic, but not well known. Dvořák's Serenade for Strings, Opus 22, II
The beginning of this movement is so especially soul piercing. the most melodic, lively, and earcatching start to a movement I have ever heard. I'm sure the rest of his 22nd Opus is just as spectacular. I've probably listened to the entire piece before. I don't remember it though
https://www.youtube.com/watch?v=7Q6WQVV1GxQ