Meeting Talos in a game would probably make me care about him more than just reading about him, though. Plus, if his official accomplishments surpass everything the main protagonists of the last three Elder Scrolls games did/can do, then I might feel less overlooked :3
I think he might be much closer than you think he is.
The first time he became known, he was a Dragonborn who united Tamriel.
Fast forward a few (lot) centuries, another Dragonborn appears, and saves the world from the worldeater, Alduin.
What makes you think those 2 were actually different people, and not incarnations of the same Aedra, aka Talos? (or maybe even Akatosh himself)
Also, for the fans of conspiracy theories: Do you detect the similarities between http://29.media.tumblr.com/tumblr_lpazedZiTw1qbr16po1_500.jpg and http://3.bp.blogspot.com/-7FpLtpB7AYs/TtOKFfuad2I/AAAAAAAAA1M/Ev49ZeTfeD0/s1600/Skyrim+Logo.jpg?