What documents will I get to ensure my full control over the company and to enable me to remove any officers or functionaries, if I want to?

Apart from the declaration of trust from the nominee shareholder, our standard Terms & Conditions of Business effectively is a contract between a licensed service provider and the client, where it clearly states who (the client of record, i.e. the beneficial owner) has the legal rights to the company ownership itself and the rights to give binding instructions.