Make all portraits the same size in the frame automatically

With all the new cool AI stuff that Photoshop is doing I was wondering if there is a way to automate the process of framing a bunch of portraits. I often have to do this when we do corporate or school portraits. We usually take a larger image that shows the majority of the torso and then crop in on them. The issue is that we want everyone to have more or less the same head size and smaller people are sometimes smaller in the frame (especially with kids of different ages). 

My usual way of doing this is to open the "Guide Image" in PS and put in guide lines over it. Then I add in all the images into layers and adjust them in the frame so the heads fit in the guides. It works but it is very manual and time consuming.

I saw in an older post that someone linked to this: https://exchange.adobe.com/apps/cc/103952. It shows what I want to do but it has really bad reviews:

Does anyone know if there is a way to do this natively in photoshop or even if there is a plugin that works? 

If not, is there any way to semi automate the process?