Quick answer — Hiroyuki Yamaga worked on FLCL (Executive Producer), Forest of Piano Season 2 (Director), DAICON III Opening Animation (Director) and 11 more anime.
Hiroyuki Yamaga worked on FLCL (Executive Producer), Forest of Piano Season 2 (Director), DAICON III Opening Animation (Director), Royal Space Force: The Wings of Honnêamise (Director), Corpse Princess: Kuro (Producer), Magical Shopping Arcade Abenobashi (Director), The Mystic Archives of Dantalian (Art Director), Mahoromatic: Automatic Maiden (Director) and 6 more.