Where is there a good explanation of the Monobehaviour, Behaviour, and Component as a complex layering model?
I'm not sure what you're after... Do you want to know the inheritance chain of the classes?
The documentation of each class have a cross link to the base class at the top.
Also this page lists all classes that comes with Unity in it’s hierarchy.
The exact inheritance of most classes is quite irrelevant since they are all sealed. For the runtime only MonoBehaviour and ScriptableObject are meant to be used as base-class (at least i can't remember others at the moment).
You should overthink your question title and add some more details since it's not really clear what you want and this page should help the whole community.