Here's a group I'm sure most of you have never heard of. It's Clamavi De Profundis, a family group who, among other works, interpret the songs of J. R. R. Tolkien as depicted in his books and in "The Lord of the Rings" trilogy and "The Hobbit" trilogy of movies. They have their own YouTube channel, where you'll find most of their songs.
I'll post just three here to whet your appetite. From The Lord of the Rings, here's "The Passing of the Rohirrim", a song of mourning for the Riders of Rohan who died in the Siege of Gondor and elsewhere.
And here's their interpretation of "The Road Goes Ever On", the iconic walking song that epitomizes Tolkien's work and the journey of the hobbits. It's found in both The Hobbit and The Lord of the Rings.
Finally, from The Hobbit, here's "The Song of Durin".
Lovely stuff! Check out their YouTube channel for more, and if you're so inclined, consider supporting them on Patreon. They also offer their music on Amazon - see their songs and albums here, including some not derived from Tolkien's works.