First an answer to the OP: Keep multiple apostilled copes of documents in different places
I too have similiar question about using company and bank account nominee.
Couldn't you create documents at incorporation with power of attorney with blank date which hands over the account from nominee to beneficial owner? Similiar as the directorship is done?
Of course these documents are for the case if nominee disepears, and you don't have anyone to control bank account.
If he diseapears with your money, you can't do nothing anyway