Great idea. I tried to pick the most influential composers and put them in order
- Nobuo Uematsu (Final Fantasy series, Lost Odyssey, Blue Dragon)
- Koichi Sugiyama (Dragon Quest series, Shiren the Wanderer)
- Kentaro Haneda (Wizardry series)
- Yasunori Mitsuda (Chrono series, Xenogears)
- Yuzo Koshiro (Ys, Etrian Odyssey)
- Masaharu Iwata (Might & Magic, Ogre Battle, Final Fantasy Tactics)
- Hitoshi Sakimoto (Breath of Fire V, Vagrant Story, Final Fantasy XII)
- Kenji Ito (Romancing SaGa, Seiken Densetsu)
- Masato Koda (Monster Hunter, Wild Arms)
- Kouhei Tanaka (Sakura Wars, Lennus, Alundra)
Honorable mentions to Hiroki Kikuta, Yoko Shimomura, Yasunori Shiono, Tomoyuki Hamada & Tenpei Sato.
1st edit: I had to cut Hiroki Kikuta for Kouhei Tanaka :-/
2nd edit: more changes, reduced to 10 people.