Tokimeki Memorial: Forever With You, Final Fantasy VII (1997), and Castlevania Symphony of the Night are the three that stand out to me as being THE top tier classics.

Of course there have been great soundtracks since then, with stuff like Journey, The Witcher 3, Hollow Knight, Hades, Nier Automata, Cyberpunk 2077 and…

PERSONA 5

(actually that one might just take the cake).