>>4444670All of this is just cope for not addressing the lighting. If you fix the lighting, all your problems may go away entirely. Picrel, you can find literally hundreds of examples of this type of lighting as it is the de facto standard for photographing things like art or documents. Everything else is secondary to this.
Dealing with polarization might still be necessary, especially if shooting with highly reflective materials, but you need to fix the lighting first.
RAW can be helpful and would be best practice for fine tuning colors (a color chart can help with this), and if shooting JPG, should absolutely set WB directly (very easy to do).
You absolutely don't need HDR for something like this. Bracketing shots might be convenient for picking an ideal exposure after the fact, but your issues are absolutely not related to a lack of dynamic range. If you want to go hyper autist, then HDR and pixel shift the shit out it sure, but only after you address the lighting first.