The stone construct produced as part of Spend Goal 7 (below) is intended to represent the golem of the title, but there is absolutely no issue of 'right' or 'wrong' where the models are concerned – pretty much any construct (I'd avoid the small ones) could be used in the scenarios with very little reworking needed.
As with most things
Frostgrave, the mini-campaign is intended to provide options and inspiration, not a single, limited course.