Reading through Wikipedia on King Arthur, I noticed the following text. While it refers to three different approaches to King Arthur, when combined they actually read a lot like a 4E character in the three tiers.
Sounds a lot like a character in the heroic tier.
A wilderness campaign, possibly in the paragon level (where I'd expect folklore, rather than legend).
By the epic tier, Arthur is adventuring into the Shadowfell, associating with and even leading gods, and wearing magic items from different planes.
I thought it was interesting, at least. At the very least, I think the final strand is a great example of the epic tier, and the first a great example of the heroic tier - and shows how both tiers are completely appropriate for fantasy role-playing.
Thomas Green... identifies three key strands to the portrayal of Arthur in this earliest material. The first is that he was a peerless warrior who functioned as the monster-hunting Protector of Britain from all internal and external threats. Some of these are human threats, such as the Saxons he fights in the Historia Brittonum, but the majority are supernatural, including were-wolves, giant cat-monsters, destructive divine boars, dragons, giants and witches.
Sounds a lot like a character in the heroic tier.
The second is that the pre-Galfridian Arthur was a figure of folklore (particularly topographic or onomastic folklore) and localized magical wonder-tales, the leader of a band of superhuman heroes who live in the wilds of the landscape.
A wilderness campaign, possibly in the paragon level (where I'd expect folklore, rather than legend).
The third and final strand is that the early Welsh Arthur had a close connection with the Welsh Otherworld, Annwn. On the one hand, he frees prisoners from Otherworldly fortresses and launches assaults on the same for magical treasures. On the other, his warband in the earliest sources includes former pagan gods and his wife and possessions are clearly Otherworldly in origin.
By the epic tier, Arthur is adventuring into the Shadowfell, associating with and even leading gods, and wearing magic items from different planes.
I thought it was interesting, at least. At the very least, I think the final strand is a great example of the epic tier, and the first a great example of the heroic tier - and shows how both tiers are completely appropriate for fantasy role-playing.