Robert Earl Keene-- anyone who can rhyme a lyric with ". . .and she came around the corner with a single-shot .410" has my vote as the greatest bard since Shakespeare.
Pauline T. -- She wrote the hymn, "How can I Keep from Singing." back in 1868. https://en.wikipedia.org/wiki/How_Can_I_Keep_from_Singing%3F
I sang a version of that when I rang the bell at the end of Chemo.
It was about a year after one of my best friends had us all out for a drink and told us he was terminal. If you ever have to share one of those drinks, you'll know.
Lastly, Dafydd Iwan Jones , the guy who wrote "Yma o hyd" . Coming from a long line of Welshmen on my mother's side, I find it about as stirring a song as you will find.