Wow, no offense but Zelda 2 is CRAZY hard for me!
Anyway, I was hoping you had Link's Awakening up there, but since it's just the (S)NES games, Ima go with A Link to the Past. They had like, 20 different items in the game!
A Link to the Past is not only my favorite "early" Zelda game, it's my favorite Zelda game ever. It's the game that perfected the Zelda formula for all future Zelda games to follow. And it holds up well even today. I never get sick of playing through the game.