I'm not sure if I am following the request correctly. You want to have a text and keep its margins but have other texts between images without margins?
If that is a case I suggest that you avoid adding the page using the normal WordPress editor. Kindly use the Cornerstone. Cornerstone has the Text Element which you can use to set margins as you like for each case.
For the images, you can use the Image element. For more information:
For more information I suggest that you check our knowledge base index: