It is widely known that editing Wikipedia on Tor IP addresses is systematically banned, to avoid vandalization from abusive users looking for no-risk anonymous editing, for their own wikipedia-unfriendly reasons.
Wikipedia provide a very helpful advice page for users using Tor.
Most of the options they offer involve setting up accounts (either on non-Tor IP addresses or via a 'request an account' process (requiring an email) if it must be Tor), and having Tor unbanned on your account, but I'm looking to make a useful edit without the pseudonymizing element of a Wikipedia username as well as either an email address or a non-Tor IP address unavoidably associated with it.
The option 'Alternative proxies' seems to be the only one for non-account editing via Tor, where it appears to be hit or miss in the blocking success rate of open proxies. This obviously includes both proxies and VPNs, to be connected to within the Tor Browser itself.
What would be a convenient way to do this in the Tor Browser, to attempt 100% anonymous Wikipedia editing on Tor? It must be free, to avoid the potentially pseudonymizing element of payment, if nothing else.