Rangers aren’t just standing still under John Gilligan’s stewardship, they are drifting even further behind Celtic, off the pitch at least. To move forward, the key roles that currently lie vacant must be filled and filled with elite level operators with a proven track record, not just people familiar to the Ibrox board. The most important role, arguably, is that of CEO. A position that has been unoccupied since the end of last season with no sign of an imminent arrival, however, Rangers would be able to function if Ross Wilson had been properly replaced as sporting director, as the departure …