The Workbench Engine is already integrated into Blender, but I think it rarely gets used and doesn’t get the attention it deserves.
The Workbench Engine was actually created, For Modeling and Sculpting as a viewport. But it can also be helpful for other things like exporting something completely shadeless and unbiased like a screen in a Mock-up for example.
I am sure, that there are a lot of different ways, to make use out of it. I used it for example in a 2D explainer for a teeth cleaning product that was made in a flat style in After Effects, but the Client said, that it is too hard to understand what the object is, so he wanted, to make it rotate in instead or being completely flat. And to match the flat style I exported it with the Workbench Engine.