the Composer of my faveorite Drakengard 2 song ("Exhausted" The Broken Past) Nobuyoshi Sano, it feels truly epic when just stopping to listen to it.
Tetsuya Shibata, Kento Hasegawa. who both composed for devil may cry 3, it really suits the mood with both ambient and battle themes, that true industrial future type music.
The guy who composes for guildwars has some pretty brilliant songs aswell.
but the best is clearly the composer for PN 03.