[Alneyan]

I must second (and even third) the suggestion of Enya for Man. Aldebaran may be fitting for the Lost of the Tuathas, or perhaps even I Want Tomorrow (the lyrics do not quite fit though).

Loreena McKennit might be good for standard Man as well (The Mystic's Dream?). For one reason, I would say Bjork's Vespertine album for Caelum (Harm of Will for example).

Oh, and In Memory of Trees (Enya) for something closer to an incantation or prayer from Pangaea.

I couldn't say anything about the other nations; my musical knowledge isn't too wide, especially when it comes to metal.