There are few retail banks off the top of my head that will open an account remotely for U.S tax payers.-- Millenium BCP, BiG, Novo Banco, Banco Atlantico. We opened Novo Banco account with our lawyer’s help, but didn’t need it so we closed it (we did the fund route and went with Bison same as you). It may be easier for you to open an account though your lawyer because your lawyer can “certify” the document needed to open a bank account. The “Taxes liquidation issued by the fiscal authority of the country of residency” sounds like it’s just a document with SSN on it or SS card.
Here are 2 topics where people shared their experiences opening a bank account: