Super Mario Mega Soundtrack Pack

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Mario Wiki
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Developer: Nintendo EAD
Composer: Koji Kondo
Platforms: Nintendo System, GBA

Street Fighter 2 (Soundtracks)

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Developer: Capcom
Composer: Yoko Shimomura
Platforms: Super NES, Mega Drive, Amiga, Playstation, Sega Saturn
Genre: Fighting

Final Fantasy VI (Soundtracks)

Final Fantasy VI 

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Final Fantasy Wiki
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Developer: Square

Composer: Nobuo Uematsu
Platforms: Super Nintendo, Playstation, GBA 

Genre: RPG

Final Fantasy IV (Soundtracks)

Final Fantasy IV 

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Final Fantasy Wiki
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Wikipedia

Developer: Square
Composer: Nobuo Uematsu
Platforms: Super Nintendo, Playstation, GBA
Genre: RPG

Chrono Trigger (Soundtracks)

Chrono Trigger  

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Developer: Square Enix
Composer: Nobuo Uematsu, Yasunori Mitsuda
Platforms: Super Nintendo, Playstation
Genre: RPG

Breath of Fire II (Soundtracks)

Breath of Fire II

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GameSpot
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Developer: Capcom
Composer: Yuko Takehara
Platforms: Super NES, Game Boy Advance
Genre: RPG