Table Contact Matrix

I am trying to build a template matrix that will allow people to insert images in the top cell to correspond with the title in the bottom cell. Not all of the types will be used on each publishing, so looking to have the grid flow from left to right, then down the rows. Some in between sign types may be needed as well (Like B.2 between B.1 and C.1). It would be ideal if the user wouldn't have to set the cells height if they make a new pair.

Current Setup:

• 42 rows, in pairs with the gray cell and then the title cell
• 4 text boxes stacked with flowing text, each with 6 columns
• As INDD doesn't allow to set the cells height in the cell style, i am using a paragraph style associated to the cell style to set the height

The problem is once I put an image into the cell, the paragraph style is wiped (obvi) and then the cell shrinks and the image is shown as overset.

I am looking to not build multiple boxes on the page that people would have to rearrange if they subtract or add a new type. is there a better way to do this?