The only way to anonymize it enough, also defeating any attempt at cookie/malware injection to me would be to create a VM with the strict necessary to run Tor browser and clone it for single use, that is, a script that clones the VM, opens it, let you use Tor browser, then as you close the browser the VM is also closed and deleted. The script could also create the next VM changing bits here and there for added anonymization (OS and browser signature, screen and window size, mouse settings, etc) while the old one is still running, to save time.