Yang should oversee tech in some way that also ties into finance. Warren would be good for Education. Pete will be in there too, for sure. Abrams too.
You don't want to move your Senate and House leadership out of investigative and voting roles. They are going to be very important. Stacy Abrams will have a role
Samantha Power as Secretary of State. I find her extremely impressive and would be perfect for the role in representing us abroad.
So serious question. Will Biden even get to have a cabinet? McConnell might just block everything or force Biden into some oddball choices. I don't anticipate this process to work very well. And forget about getting any judicial appointees. Biden will get a grand total of zero judges. Biden's cabinet might end up as screwed up as Trump's was towards the end (when Trump was just appointing "acting" directors to everything).
Warren at Treasury should be a shoe-in I'd like him to go outside the norm (not politicians) for a few big/minor ones...like Energy/Interior eta: Romney or Kasich for which positions?
Problem with this is that Massachusetts governor is Republican. So if Dems are hoping to control the Senate, they can't lose Warren. Besides that, I'd love her in this role.