Of those listed, Yoko and Nobuo.
The former are widespread too, including being part of Radiant Historia and more.
As for my write-in, whoever was in charge of Atelier Iris 2's soundtrack, and likely some other entries and games. AI2 had basically the best soundtrack of the entire series.
I am the Hunter of Topics. My post never fails to kill its prey.
*pounces* Nyaa!