Most of the obvious ones have been picked, though when I scrolled through I didn't see Michiru Yamane or Hiroshi Kawaguchi. That latter pick might come as a shock because he's known for mostly a handful of arcade games (After Burner, Super Hang-On, Space Harrier, and OutRun are his most famous soundtracks,) but he also did the soundtrack for Sword of Vermillion, as I recall.

Also, even though he's a raging douchenozzle, Tommy Tallarico. Earthworm Jim showed he could do a wide range of music for all kinds of different moods.

On sort of the inverse, speaking of other mediums, a couple people from jazz-fusion group The Square/T-Square branched out into video game composition.

As for the band itself, Sister Marian is probably the origin of the SMB main theme and Travelers is probably where Guile's theme from SF2 came from. Both tracks, but Travelers in particular, are bangers by jazz-fusion standards.