Word can actually do a pretty good job of text layout once you learn how to use styles, templates and cross-referencing properly.
For consistency of image alignment, resizing etc that styles won’t handle it is pretty easy to learn enough VBA through googling to get Word to (for example) go through all images in a document and centre them / insert a page break before/after / whatever you want really. If there is a good plugin that automates all this it is probably just some VBA someone has packaged up. I had some nice VBA a few years ago that would ask for a folder and then import each picture in that folder into a three-cell-wide table in a Word document, resizing them automatically. Hardly cutting-edge programming but saved us huge amounts of repetitive work.
Latex does a good job too but has (IME) a steeper learning curve.Probably worth learning for a PhD dissertation or something with formulae, but if your main issues are paragraph breaks and image formatting I would just learn to use styles in Word.