I'm presently messing with my iTunes.
For you low brass fans:
"Play That Country Tuba, Cowboy" (Stan Freese tuba) on the album "The Vandals Play Really Bad Original Country Tunes", then "The Playful Pachyderm" and "Pokarekare Ana" (Steven Mead euphonium) from the album "Euphonium Virtuoso".
Among tuba soloists Stan Freese is near the top I think. He doesn't record much because he's built his career mainly in various leadership roles for Disney. I think his Carnival of Venice is the best out there, bar none. I don't know of any recording of that except on an LP produced by the Univ. Minn. after their 1969 Soviet Union tour.
What I would call African folk-rock-jazz fusion:
"Living Loving Feeling", Osibisa album "Black Magic Night". Just about anything from Osibisa is good. A British group - sort of like an African version of Santana.
Steve