Camden Grey. If I'm buying from one of my more general suppliers, like WSP or Brambleberry, then I might throw in 2 ounces of mint or lavender EO. But if I want several EOs, or a more substantial quantity, then Camden Grey.
I mostly purchase fragrance from Bramble Berry because it is the only company I have found that says how the scent will most likely behave in cold process soap. I would like to try other companies but they just do not give enough information.
I have had a lot of fragrances cause problems and ruined my soap batches when I had no reliable information about how they would perform.