Quick answer — Hajime Yatate worked on Gintama Season 4 (Original Story), Cowboy Bebop: The Movie - Knockin' on Heaven's Door (Original Creator), Mobile Suit Gundam: The Origin (Original Creator) and 68 more anime.
Hajime Yatate worked on Gintama Season 4 (Original Story), Cowboy Bebop: The Movie - Knockin' on Heaven's Door (Original Creator), Mobile Suit Gundam: The Origin (Original Creator), Mobile Suit Gundam 0080: War in the Pocket (Original Creator), Mobile Suit GUNDAM Iron Blooded Orphans 2 (Original Creator), Turn A Gundam (Original Creator), Mobile Suit Gundam Hathaway (Original Creator), Mobile Suit Gundam: The Origin - Advent of the Red Comet (Original Creator) and 63 more.