Does his tunic + cap combination count?
Aha, but I think the either the; Bow & Arrow, Bomb, or Slingshot tends to be his signature item.
I would argue his bow/arrow is his most iconic item. I don't recall a single Zelda game bar AoL that DOESN'T have the bow and arrow as a usable item. Same could be said for bombs, but who honestly knows Link for his bombs?
Bomb arrows are also in Link's Awakening.True even though his bombs are very useful and apparently can be combined with the bow and arrow (tp)