Red Arremer composed by Harumi Fujita, Yoko Shimomura, Tamayo Kawamoto, and one other person.
Shimomura says in her works list that she made a small contribution to the game: http://www.midiplex.com/works.html
Harumi Fujita said in a 2011 interview that she thinks she wrote "Dark Road" for Gargoyle's Quest, and that Tamayo Kawamoto was a third composer: http://shmuplations.com/harumifujita/