I don't think you're going to get what you want. Templates are only useful when the drawing is first being created. Sure, you could pre-build a template with three sheets and the third sheet could be divided up the way you want, but there is no way to automatically add multiple models to the drawing and then have the template views map to each of these. Companies who do large, multi-sheet, multi-model drawings achieve this through automation. A 3rd party program creates the sheet, adds the models, creates the view, and adds any other items (tables, notes, etc.)
Yes, you could certainly create a single format that is divided up, but you will manually have to change the format in the drawing every time you add sheet 3 (or more.)