Oracle games were great from that list. I loved them, best Zelda games ever imo, you'll know what i mean if you link them together. (you can play the game with two different storylines depending on which one you play first)
But my favourite GBC game easily was Mario Tennis. OMG how many more pWnage games are there? I wish they release a sequel on GBA, that would rock (like Mario Golf) the game was extremely addictive and was pretty much like an RPG by a lot of standards. And the greatest part of it all is you actually learn something about Tennis ;D