I appreciate the steps you've done to resolve this issue, Indycals.

Since you're unable to condense your company file, and the verify and rebuild steps didn't work to resolve the condensing issue, I'd recommend reaching out to our Phone Support team. An agent can take a look at your file and isolate why you're unable to condense the data. 

You can reach out to them through this link: Contact QuickBooks Desktop support.

Once your able to condense your data, you can check this link for the detailed steps to condense your data: Use the Condense Data utility.

I'll be around if there's anything that I can help with. Keep safe!