Underrated Zelda Songs

[PhantomTriforce]

Palace/Great Palace theme from AoL
Miniboss theme from WW and MM
Zora's Domain from TP
Light Word and Dark World Dungeon from ALttP
Hyrule Castle and Dark Hyrule Castle from ALttP and MC
Phantom Ganon theme from WW
Goron Mines from TP

 

[SavageWizzrobe]

Dungeon Theme (LoZ)
Level 9 Theme (LoZ)
Great Palace (AoL)
Lost Woods (ALttP)
Hyrule Field Theme (OoT)
Boss Theme (MM)
Wind Temple (WW)

There's probably more, but these are the ones that come to mind right away.