Human Race: GleenStafford, composed by Roland Jones, epic and magnificent

Night Elf Race: for kalimdor

Orc Race: Not found (some Orc Race The music download address calls it "Enlivening the Orcs")

Undead: Not Found (Some say it is Undead Overture...) Others say it is Ever Dream

Over The Hills And Far Away

Hope this answer is helpful to you