I read a post on another forum where someone shared a link to a beautiful piece called, "Share My Yoke". I searched the web for other recordings and sheet music with piano accompaniment. Found it in the UK at 'Just Music UK' so ordered it. It's for Bb cornet but I read TC anyway. "Share My Yoke" was written by Major Joy Webb of the Salvation Army. Maj. Webb was founder of Salvation Army music group, "The Joystrings" back in the '60s. The arrangement for piano is by Ivor Bosanko. There are also arr. for brass band and wind band. Not sure the wind band arr. would work for euphonium since the intro is played by euphonium.

To listen to two excellent recordings go here:

Scroll down some and you'll see two video links. The first one is with euphonium. They don't give credit but pretty sure it's Derick Kane. Just beautiful! (although not crazy about the synthesized strings). The second video is with brass ensemble with Hans Gansch playing cornet. Also beautiful.