Update from my end:
Cleaning my case (to improve GPU temps) and moving the WoW install to the C drive didn’t resolve the issue. My GPU temps did improve by a degree or two, but it’s still in the 75-80 range, which should be perfectly acceptable for an Nvidia card.
So, I tried to remove the graphics driver again, but this time I used the DDU (Display Driver Uninstaller) tool to fully remove the driver and reinstall the latest from Nvidia. Much to my surprise…so far this has worked. I’ve been able to play for longer periods without a freeze thus far. I did dailies last night and this morning along with a couple bosses in LFR as test cases. Tonight I have raid with my guild, so we’ll see if it holds. If it does, then the issue is either resolved or at least back to a manageable level.
To comment on Karsh’s experience. Removing my addons, uninstalling and reinstalling, and moving the install were all unsuccessful for me, and in fact made my issue much worse to the point where I could no longer log in to a character without forcing DirectX 11. Also, after looking at your dxdiag Karsh, we both have a GeForce GTX 1070 card, which could be a common element to the issue, possibly.