The Legion could be a Biker Gang with puppet clubs called Auxiliaries. Maybe the Lost Roman Legion gained immortality by serving some a Dragon. They could make a nice counterbalance to Einherjaar (sp) say.
EDIT: Legion also has demonic possession connotations if you want to go that route
By the way for what rp is this for if I may ask? Setting, plot, level (i.e. submerged, submarine) e.t.c.