Mike Clarke is a famous composer who former worked for Psygnosis. Among his most known works are the musics for Last Ninja 2 on the Amiga or e.g. Lemmings 2 on the SNES. He speaks about his experience of doing "a little bit of everything" as a composer, coder, manager, etc from the C64 throughout the Amiga, SNES, etc.
Nolan Bushnell is an American engineer and pioneer and founded Atari Inc and is considered one of the founding fathers of the video game industry. He also did the co-op version with scoring and sound called PONG for the arcades.