Should we start with Michael McBride? He featured rather heavily in the Mutant Chronicles RPG (representing the "average guy" of Freelancers in the RPG rules, narrating the how-to in the Freelancer´s Handbook, fighting alongside the player characters in the Mishima sourcebook adventure, and also appearing in the sidebar fluff of the Algeroth sourcebook). He appeared in the DoomTrooper card game, but never made the jump to WarZone.
McBride is a former staff sergeant in the Blood Berets, having fought in the New Bocca campaigns on Venus and taken part in the storming of Alakhai´s Citadel. He had more than his share of action, since a personal enemy, Brigadier James Arthur Carrington, saw to it that he got assigned the most dangerous missions. (Carrington was later revealed by Major Strasser to be a Heretic.) Finally, McBride was dishonourably discharged, left the Imperial fold and started working as a Freelancer.
During his career, he has been known to work for Major Strasser of Bauhaus Security, Inquisitor Kane of the Brotherhood, gang barons like Fat Freddie, and an assortment of other clients, acting as hired muscle or private eye. McBride is the typical "knight in tarnished armour" of the film noir: a moral person in an amoral world, preserving his own code of decent behaviour, but hiding it under a thick veneer of cynicism and gruff demeanor.
The Mishima sourcebook actually has RPG stats for him. McBride could be either represented during his stint in the Blood Berets, where he would be an Imperial individual model, wearing heavy composite armour and being armed with an Invader assault rifle or Intruder SMG, possibly with the usual Blood Beret sidearm. Or he could be represented as a Freelancer – the picture by Paul Bonner shows him wearing combat fatigues with Capitol light body armour (similar to the Free Marines´ armour), with Bauhauser shoulder pads, toting two Bolter sidearms. As a Freelancer, he would not be attached to any Megacorporation, but could be picked by any force except the Dark Legion.
Either way, McBride has proven to be resourceful and strong-willed, being able to resist the Dark Symmetry on sheer willpower in several cases. He is very good with firearms, less so in close combat; his exceptional agility makes him very quick and dangerous (he has 5 actions per round in the RPG, which is a more than excellent stat!). In the interview with Major Strasser in the Bauhaus sourcebook, he is likened to a Venusian devilcat: being able to explode from repose into violence in a split-second.
As a (former) Blood Beret, he should have jungle training and other Blood Beret special abilities.
There is, by the way, a McBride miniature (from the old Mutant Chronicles series, long since discontinued), showing him kitted out in the latter version. Maybe the Warzone guys over here could come up with stats for him.