Music composed by Glenn Stafford
When it comes to the Warcraft II soundtrack, I actually prefer the Orc soundtrack over the Human soundtrack (albeit only slightly). "Orc 1" is s prime example of how awesome the Orc soundtrack is thanks to its frequent use of the harpsichord and its very baroque sound; you could almost imagine an Orc version of J.S. Bach having composed this (and no, Glenn Stafford, I'm not suggesting you look like an Orc ;)).
If you're interested in downloading the Warcraft II soundtrack (that was originally available off Fileplanet), you can get it on the Free VGM repository.
[ VIDEO: Choicest VGM - VGM #322 - Warcraft II - Orc 1 ]