As if it weren't obvious, here's what I assume are composition credits:
01: Stafford
02: Duke
03: Bush
04: Bush
Also, is
this a thing? It mentions Victor Crews as a fourth composer (for Frozen Throne only), but I don't hear anything that couldn't be plausibly attributed to the others. Maybe he was brought on for cinematics. I also wonder where the track titles came from.
Based on those track titles, I'd suggest the following breakdown for Frozen Throne in-game music:
The Frozen Throne -
Duke
The Night Elves' Song -
Bush. "Return of the Ancients" from this EP.
Illidan Stormrage -
Bush
Lady Vashj Of The Naga -
Bush
In Pursuit Of Illidan -
Bush (you can hear a night elf theme he used in WC3 vanilla)
Vengeance Of The Blood Elves -
Stafford
King Arthas Of Lordaeron -
Stafford
Last Days Of The Alliance -
Stafford. "Dark Convenant" from this EP, with the beginning moved later and arranged with different synth.
Power Of The Horde - ...
The Orcish Hordes -
Stafford. This is actually from World of Warcraft vanilla, track 5, "Echoes of the Past".
Remnants Of The Horde -
Bush. "Legacy of Flame" from this EP, where it's heavily arranged.
The Lich King -
Duke
Last Days Of The Scourge -
Duke. "Dreadlord's Plight" from this EP.