Inertia is an extremely popular hacked client for Minecraft 1.16.4 and 1.15.2. This hack can easily be used to hack a server and become an admin. Forget about outdated cheats that are not relevant for a long time, because for a real hack you need top functions.
Flare is a popular cheat for Minecraft that allows you to become a hacker. Now all servers are available for hacking. You can even use an op hack that will allow you to become an admin on the server.
Quite popular in narrow circles cheat for Minecraft 1.16.4. Using cheats on the server, you can achieve good results. This client does not stand out too much among others, but it has some differences.
The latest version of the free cheat SalHack 2b2t + config for Minecraft 1.12.2. In this modpack there is a stashfinder, which flies for you and looks for all sorts of stash, etc.