What should be your most appropriate action upon finding an elderly couple unconscious with the smell of natural gas present?

The most appropriate action in this scenario is to rapidly remove the patients using a blanket or clothes drag. The presence of unconscious individuals in an area where there is a smell of natural gas indicates an immediate risk of an explosion or fire. Therefore, it is critical to prioritize the safety of both the victims and the responder.

Removing the patients quickly helps to ensure they are out of harm's way as soon as possible, thus minimizing the risk of further harm from potential gas-related accidents. This action also preserves the opportunity for immediate medical intervention if necessary.

While assessing the patients before taking action might seem prudent, doing so in the context of a gas leak can significantly delay critical care and increase danger. Turning off the gas supply is important for overall safety but should not be attempted until the patients are safely removed from danger. Calling for additional support could also delay necessary emergency action. Therefore, the most effective initial response focuses on immediate evacuation from the hazardous environment.