I want to ask is it possible to assign customized roles to particular users at the node edit page? For example, the node author/admin can assign "editor" role to user A & user B and assign "admin" role to user C at the node edit page. The node access control is different among different nodes and different users.

I found some related modules such as Permissions by Term and Permission by field but none of these can perfectly fulfill my requirements. I am using Drupal 8 so some modules may not suitable for me.

Is there any solution for that?