|"I then ran a driver cleaner, cleaned out all AMD/ATI and NVIDIA drivers"|
"Driver cleaners" should be avoided. Many contain malware. Just use the AMD/ATI or NVIDIA uninstaller. If for some reason you feel you need more of a deep clean, use the free version of Revo Uninstaller.
I'm guessing your laptop is an e1705? Here's what it says at the Dell site:
"Dell is not testing or developing Windows 10 drivers for this product. If you choose to upgrade, some features, applications, and connected devices may not work as expected"
Good luck finding compatible graphics drivers that will work. Search for the AMD legacy driver for Vista, then install the driver only (without the Catalyst Control Center) using Compatibility Mode & Run as Administrator.