Here it is, all Battle OST from each Baldur's Gate game. Polished for fuller sound.
Original composers: Michael Hoenig, Inon Zur, Howard Drossin.
Track times and titles:

Baldur's Gate I:
Gorion's Battle 0:00
Hobgoblins and Worgs 1:10
Attacked By Bounty Hunters 1:57
Giant Spiders 3:41
Bandit Melee 4:52
The Gibberling Horde 6:15
The Last Battle 7:40
Swords Against Darkness 8:40
Attacked By Assassins 9:43
Fighting For Survival 11:11
From Out of the Storm (Sarevok Battle) 12:29

Baldur's Gate II Shadows of Amn:
Forest Battle 2 13:47
Forest Battle 1 14:39
Plains Battle 1 15:50
Plains Battle 2 16:54
Mountain Battle 2 18:04
Mountain Battle 1 19:04
City Battle 1 19:54
City Battle 2 20:47
Sewer Battle 21:50
Shadow Battle 23:57
Dungeon Battle 2 24:55
Irenicus Final Battle 26:01
Red Dragon Battle (Dragon Battle) 27:04

Baldur's Gate II Throne of Bhaal:
Bhaalspawn Battle (Sendai/Abazigal Battle) 28:01
Melissan Battle 30:12