we have pensionista visas, no job in Argentina, and Galicia opened a dollar account for us, no problem. We do have DNI's, but I would assume his argentine wife does as well.
But, while I can transfer money into my account by western union or wire transfer, I think its harder to get dollars OUT, and certainly, either way, there are still international transfer fees.
Western Union transfers arrive in pesos, and there is no Argentine bank charge, but Western Union does charge to send the money.
We are required by migraciones to make transfers into a personal bank account, but an Argentine citizen would not be required to do so.
I am pretty sure Santander would also open a dollar account, where, if you transfer dollars into argentina, they remain dollars.
I dont know if this is enough utility or not for the OP.
I know I can make transferencias in pesos from my Galicia account, from my phone, when I am in the USA. So I can pay the air conditioner repair man, order things on Mercado Libre, pay my expensas or utilities, or buy my friends dinner.
It all depends on what type of transactions the OP needs to do.
Online banking in Argentina advanced a huge amount, during Covid, because it had to, and its much more useful and easy to do.