I recently re-read the entire series for like the 5th time, and I realized something about the Unmade. At least 3 of them are confirmed to have a surge.
Dai-Gornarthis: Transportation; This is supported not only by their actions at the second battle for Narak, but also by page 97 of the Roshar world guide.
Sja-Anat: Transformation; This is less clearly stated, but given that she literally changes spren, it seems to be obvious to me
Ba-Ado-Mishram: Regrowth; This is the weakest tie I can make, but in WaT, during the vision where Shallan is in the body of a Singer, we can see Mishram healing various Singers, something no other Unmade can seemingly do. She does not gain the ability to bond to the entirity of the Singers until after she takes up the power of Odium.
Anyways, I have been trying to dig and scratch my brain of how the other 6 surges Odium has access to can map to the unmade. Please feel free to tear apart my pondering, but I feel like there is something here. Below are my best guesses so far and their reasoning.
Ashertmarn: Gravitation? The pull of indulgence?
Chemoarish: Abrasion? I have nothing here, I just know Adhesion is for Honor and this is what I had left.
Moelach: Illumination? Showing visions of the future?
Nergaoul: Tension? Creating tension to lead to conflict?
Re-Shephir: Cohesion? The way she controls the midnight essence?(Yes I know the essence is controlled by its bond, I am reaching here)
Yelig-Nar: Division? The destructive power he brings to the battlefield?