Guys, I finally got it working.
It turns out the Generic PNP driver was being used by Windows. After doing a fresh install of Win 10 I still was having issues, but as soon as I loaded up the LG driver it hummed along beautifully.
Thank you all for your input! I learned a lot from y'all.
As a side note:
My new Acer 144Hz monitor came in today, but I was getting a horrible flickering out of the box when I set it above 60Hz. After a lot of troubleshooting, I found out this is an
issue a lot of RX 480 owners are having. Now I'm REALLY debating returning everything and going full Nvidia.