Fur, Hide, Studded, Leather, Elven, Scaled, Elven Gilded, Glass, Dragonscale, Worn Shrouded, Forsworn, Variety of Guard Equipment, Imperial Light Armor, Penitus Oculatus Armor, Stormcloak Armor, Stormcloak Officer Armor, Thalmor Light Armor (Thalmor Specific Elven Armor).
Those are the ones I can think of off the top of my head that are un-enchanted. Keep in mind that for the Stormcloak Officer Armor, the boots are Light Armor, and will raise your Light Armor skill, but are considered Heavy for some reason and are effected by Heavy Armor perks and skill, so you won't be able to get the set bonus using that set unfortunately.
Good luck.