Well, stating the obvious here, but what one considers “great” is entirely subjective.
I for example would find Zelda music to be “good” not “great” although I could at least name 3 favorites.
And it’s maybe not even that. It depends on the mood I’m in.
Do I want a more soothing experience? DQ has lively and heartwarming melodies.
Do I want to rock it out as my imaginary limit gauge starts building? I listen to FF!
Do I want the best of both? I listen to Chroko Trigger.
For example, I used to think Hideki Naganuma’s music was... weird and out of place, but lately I’ve felt like listening to Jet Set Radio And Sonic Rush.
But yeah, favorite game soundtracks.
Chrono series
FF series
Streets of Rage series (anything Yuzo Koshiro)
Kid Icarus Uprising
Hard Corps Uprising
Sonic (in general, never disappoints)
Megaman (see Sonic)
Shovel Knight (Jake Kauffman in general)
Double Dragon Neon
StarTropics series (bias aside)
Ninja Gaiden, Blaster Master, etc etc etc
And I want to say Castlevania? But although I hold it in the highest pedestal possible, I feel like I haven’t listened to enough amazing tracks. I don’t know what I’m missing but I only seem to enjoy Cv1, 2 and Rondo’s osts.