Commander Shep Shepard, paragon Earthborn Soldier.
Base model is an Infinity Pan-Oceanea Orc Troop w shotgun. Pity about the shotgun as I mostly use an assault rifle in ME, but no biggy.
Dr. Liara T'Soni
Infinity Alpeh Sophotects with her assault rifle cut down and a bit of greenstuffing to add some more accurate straps and torso armour.
Tali'Zorah vaas Normandy
Infinity Haqqisslam Odalisques, with a rather large amount of modification.