See:
https://www.actions4photographers.com/Class.htm
for example. I do not know how these montage/composite PSDs are laid out (a layer for each image and each text name below the image?) but if it is laid out correctly, you can use PS's data-driven graphics to do all of the heavy lifting.
Here is an old tutorial I made, many years ago:
https://photography-on-the.net …/showthread.php?p=8165676
that will get you started on data-driven graphics - your application is a little different, but the same concepts apply: name all of your assets something useful, make a spreadsheet that lists all of the assets and tells PS where to put them, and, boom, automatically generate the comp. This is ideal if you need to edit or change/add elements, or repeat the process for another group, etc.
Good luck,
kirk
PS - I googled "photoshop marching band group template" to find the above link to the templates. You might consider also searching "photoshop fraternity sorority group templates" or similar.