Ok, just look at the series and the obvious comparisons with Gilgamesh.
In The Epic of Gilgamesh, Gilgamesh is a powerful king (indeed, undefeated, no one on earth can withstand his might) who's domain has become corrupt. Enkidu is a wild man, formed from the earth by the gods in answer to the cries of the people. In the Epic they send Enkidu to the city, so that he can kill Gilgamesh, but in the end Gilgamesh wins the fight, yet respects Enkidu as an equal. Together they go to face the demon Humbaba (notably weilding swords weighing 150lbs a piece... which is where the sheer immensity of the ninja skills actually becomes a valid comparison for the scale on which these epic heroes operated).
In Naruto we have the main character, described as a "ninja", part human, part fox spirit, a clear reference to Enkidu's bestial nature. In the second arc he reappears, ferrying the citizens of Konoha city back to safety. As in the Epic, he has been sent by the gods to answer the prayers of the people, and to challenge Naruto, our analogue for Gilgamesh, breaking him out of his comfort and safety, and forcing him to face his own corruption, in this case split off into the character of Sasuke.
In the Epic of Gilgamesh, Enkidu's role is to eventually die, spurring Gilgamesh to be begin his quest for eternal life. In Naruto, this part of Sasuke's role has already been fulfilled by Hokage, whose death ushers in the arrival of Orochimaru, Sasuke's quest for the latter part of the series. Just as with the Epic of Gilgamesh, this quest is ultimately hopeless; just as Gilgamesh fails to achieve eternal life, despite seeing that it is possible, so Naruto never truly possesses Sasuke, as he too fades from his grasp.