Just having a look at the Zeldapedia on Hylians, the opening paragraph suggests that aside from Link, there have been many Hylian heroes:
The Hylians, also known as the Hylia people, are a recurring race of humans in the Legend of Zelda series. Creatures that worship the goddess Hylia, from which their name derives, the Hylians are the original race of Hyrule. It is said that they were created by the Goddesses Or Oocca race. Physically, Hylians resemble other humans, and the only difference appearance-wise between them is the Hylians' long, elf-like ears that supposedly enable them to hear special messages from the goddessess. It is shown that Hylians have an extended life-span, to the point of living for centuries. Their heritage also gives them unique psychic and magical abilities. The Hylians have therefore given birth to many heroes through the ages, most notably Link.
So aside from Link, which other heroes were there, or are they merely suggesting the multiple incarnations of Link are the "other [Hylian] heroes"?
Best Answer
I believe what this text is referring to is the many incarnations of Link. In each Legend of Zelda game, you play as a similar but distinct hero. This is why you are able to name your character, and none of the Green-clad heroes are ever officially referred to as "Link" in-game. There don't appear to be many if any other references to great heroes of Hylian descent, or at least I couldn't find any.