myopenledger Root account refers to the first account that issues the native currency when you set up a private network. I think what you are looking for would be multisig and maybe the feepool coming with protocol 13 update.
Here is an informative video about fee pool by @tyvdh :
https://www.loom.com/share/58d9f07631cd4450af7132a0af0d61c9
There are plenty resources about multisig. You can manage other accounts with a 'master account' if it's signing weight threshold is high enough.