I’m still gathering information, so if you know if any of the following is mistaken, please do share.
But one option that seems possible; Form a Private Interest Foundation (PIF) in Seycelles, where by law, it can its own beneficiary. The attorney forming it, assigns a Nominee Councilor and the US citizen can be an authorized representative / financial adviser of the foundation.
Then form an IBC in Belize, and have the PIF as the owner. The attorney forming it, assigns a Nominee Director and the PIF is the Nominee Shareholder. Then US citizen can be hired as a contractor, who can execute trading and be the only authorized person to access the bank account.
US citizen in this set up, does not own or have any interest in either offshore entity (is just paid for work done and pays their income tax), so CFC and FATCA shouldn’t be a factor if I’m not mistaken.
Biggest issue, I see, is making sure the Nominee Councilor and Director’s contracts, don’t allow them to take over or have access to the money.