1
If you are able to get into Safe Mode, open Device Manager, expand the Display Adapters section and uninstall the graphics card, then restart your PC to test if you can then get into Windows normally.
2
If not, you indicate you cannot upload the minidump files, are you able to copy them out to a USB or phone and then upload them using another device to any cloud service like OneDrive and provide a share link here for analysis.