I really think they missed a big oppurtunity with Liam Neeson in Fallout 3, he has a wonderful voice.
I seem to remember that any mention has talked about some sort of Blade Remnant- as in a group of highly trained warriors.
That would be an interesting character- willing to die for an ideal he's only read and heard about and a bloodline risen to the stars far before his time
and to remain a bastion of hope, virtue and order as the land falls into chaos around them. And dreams of a city with a white spire, seen only from afar and in wistful dreams. He would pretty much have to be a nord to get on in Skyrim- or an imperiial who has lived there most of his life.
I imagine his base would not be unlike Cloud Temple (I haven't played OB in a while- that is waht it was right?) and the various functions that has would sere as training areas (library for magic and alchemy, range for archery, armoury for armour, sparring for melee), and he would talk you through them.
That is of course assuming you don't start in prison