Black Screen when booting into freshly installed Catalina 10.15.1

The context behind my problem:

I've been stuck on High Sierra (10.13.5) for the past year or two since I was using a GTX1060 graphics card. Yesterday, I decided to purchase a SAPPHIRE NITRO+ Radeon RX 580 8GB graphics card so that I could finally upgrade MacOS. I purchased that specific graphics card since most forums seemed to indicate that it would work out of the box.

After I bought the RX580, I checked to see if it would work with my existing High Sierra installation. I removed some Nvidia kexts and I removed the nvda_drv=1 boot flag to prevent the Nvidia Web Drivers from being used and it worked no problems!

At this point, I decided that I would try to upgrade to MacOS Catalina. Since 10.15.1 is the current version of Catalina available on the Mac store, that was the version I upgraded to. I did some Googling prior to upgrading to Catalina and saw that people with RX580's were getting "black screens" from 10.15.1.

The remedy was to upgrade to the absolute latest version of Lilu and Whatevergreen so I did that before I started the update hoping that this would mean the install would go smoothly.

The installation process from High Sierra 10.13.5 to Catalina 10.15.1:

During the install process of Catalina, the only issue I faced was the "Stuck at apfs_module_start:1683" error, which I resolved by adding SSDT-EC file to EFI/CLOVER/ACPI/patched/. The solution on this thread also had SSDT-XOSI file in the patched folder so I added that in for good measure. After adding those files, the Catalina installation finished without any more issues.

The problem - unable to boot into freshly installed Catalina:

Since I boot in verbose mode, I see a stream of text during startup. The stream of text disappears at which point I expect the Apple logo and progress bar to appear. However, instead my Dell U3219Q monitor outputs "No Display Signal". Since I've jumped from High Sierra to Catalina, I'm having an especially hard time debugging the issue so any help is appreciated. Attached is what my CLOVER directory currently looks like.

CLOVER folder: https://cloudstor.aarnet.edu.au/plus/s/NLoHXDDU4Obx5nu

Things I've tried:

• My graphics card has display ports and HDMI - I've tried plugging my monitor into both.
• I've tried using an SMBIOS of 14,2 but it just gives me a kernel panic. My current SMBIOS of 17,1 seems to work the best.

Potentially useful info for debugging:

• I have integrated GPU turned off in my BIOS - turning this on didn't work and caused a kernel panic.