The Last and Final Word: Kenta Cho
Kenta Cho is a Japanese independent videogame developer. He became wildly popular and is considered influential for releases such as rRootage, TUMIKI Fighters and Torus Trooper. In fact, TUMIKI Fighters became so popular that a game called Blast Works (which was directly based on it) was released for the Wii.
The Last and Final Word: Jph Wacheski
Jph Wacheski used Game Maker for years, before moving most of his efforts to ZGameEditor. He has built a reputation for his experimental shmups and quality remakes, although now most of his recent work is displayed in the ZGameEditor forums, rather then his website.