Norio Hanzawa is another underrated composer that I follow; Gunstar Heroes, Guardian Heroes, Dynamite Headdy and Mischief Makers are probably his most known works and most Genesis/Mega Drive fans would recognise his work right away.
He is also the composer of various Konami games (such as The Simpsons Arcade, Castlevania and Contra) before that development team left to form Treasure. Listened to his work various times over the years just felt he's worth highlighting since his musical style is unique and heard in so many games and yet not a name that well known despite being in such highly acclaimed games.
His music evokes such a uniquely 90s style and sometimes get so weird. His synth work veers off into sounding quite strange (Stretch Panic/Freak Out OST, for example; Mischief Makers, Astro Boy GBA, Advance Guardian Heroes and Dynamite Headdy other prime examples). I really like his Sin & Punishment 2 OST as well. Shame his work is so often ignored despite it enhancing the games overall so much.