Very Frustrating Crash/Restarts.

I am trying to troubleshoot a Crash/Restart problem with my 2017 27" iMac, 4.2GHz i7, 40GB ram, Radeon Pro 580

I was getting daily "Your system was restarted due to an error". It seemed to happen after going to sleep. Ive googled just about everything I can think of, Ive even replaced the aging Fusion drive with a SSD.

I downgraded the OS back to Mojave because I dont remember this happening then, but it is. Ive tried all the internet goto remedies , reseting PRAM, wiping and clean install, disabling deep sleep, unplugging USBs, booting up to hardware check.... If it pops up on google, Ive probably done it.

I am very desperate (well not enough to make a Genius Bar appointment). I can't force the problem to happen. The system used to restart and you would practically not know it crashed. Lately it hasn't been restarting.

Not sure what is safe to copy/paste without giving out sensitive info. But here is a small snippet of a few crash reports.. I get about 12 a day, well less now that it has decided to not restart. It is always the same "thread" if that the correct term, PersonalizationPortrait, or root.maintenanse-qos, or, root.background-qos