"Administrators, commonly known as admins or sysops (system operators), are Wikipedia editors who have been granted the technical ability to perform certain special actions on the English Wikipedia. These include the ability to block and unblock user accounts, IP addresses, and IP ranges from editing, edit fully protected pages, protect and unprotect pages from editing, delete and undelete pages, rename pages without restriction, and use certain other tools."

For more info see: https://en.wikipedia.org/wiki/Wikipedia:Administrators

Sorted by the lowest hiearchy :

1. IP edits

2. Registered new user

3. Registered old user, with a mobs of fellow old user, that could enforce anything in the name of "community consensus".

4. Administrator. An ascended registered old user with a mobs of fellow old user "supporter" who vote for them during the election session. They actually wield power to ban user, permanently delete someone contribution, and lock the pages. Abuse of power is rampant so far. There's no balance of power at all to fix this problem except hoping the majority of "good" administrator (and public outcry) finally oust a "bad" administrator.

5. A mobs of administrator. Any infightings inside the administrator circle could be overpowered by the majority mobs of administrator, all again in the name of "community consensus".

Political battle inside Wikipedia is bloody and i've experienced it first hand.

Oh, regarding the level 5 user (a mobs of administator), here's an interesting story :

https://www.engadget.com/wikipedia-banned-seven-users-after-...

Why seven? Because you need to control a majority of administator to finally wield the ultimate political power across the whole wikipedia.

from https://en.wikipedia.org/wiki/Wikipedia:Administrators