Best I can think of (vanilla) is close to where you already are:
Main armor choices: Fur variant #2 (covered shoulders, bare legs & midriff) or Savior's Hide or Ancient armor.
In each case, I'd pair the armor with scaled boots and scaled bracers.
Of those options, I'd go with Saviors Hide + scaled boots & scaled bracers. That 'outfit' is all light armor, it has magic resistance, it has decent armor rating, all three elements go well together because they each have fur + metal, and the outfit shows plenty of leg. What's not to like?
Sure. Fur armor comes in four variants. http://www.uesp.net/wiki/Skyrim:Armor#Light_Armor_Images
1. Topless (bra for ladies) and bare legs.
2. Fur on shoulders, but bare tummy and legs
3. Torso and legs covered, but 'short sleeves'.
4. Torso, arms and legs covered.
I think (could be wrong) that in the Construction Kit that's the numbering system used. Regardless, you can see what I mean.
Here's a http://i.imgur.com/NxhRumx.jpgof the one I mean in game.
I agree with Acadian on the fur armor thing, maybe as a starting point, unless your tomb raider is less of a stealthy type and more of a hack and slash thing. Since Lara Croft is more fit/relies on her ability to solve puzzles and sneak around, I'd say this fits really well.