We use Rawtherapee and dcamprof (via the Lumariver GUI) at my artwork reproduction shop. You can find a slightly outdated high-level overview of our process here: https://www.bslprints.com/digitization
I’m more than happy to get with you and help you develop your workflow. For us, moving from Lightroom to Rawtherapee+Lumariver was an absolute game changer when it comes to even exposure and easy color-matching.
I’ll be at Imaging USA conference this week but feel free to email me at katrina@bslprints.com and we can go over your workflow.