If I follow you correctly, this is still a problem. You are saying that there are first things that exist that don't necessarily act. However, by virtue of existing, they will inevitably act. In this way, actions are attributes that "hang onto" entities and those actions are only there as a consequence (or "by accident"). It's the reverse of platonic action you described: a platonic form of existence, from which numerous actions will spring.
I know somewhere in ITOE Rand commented on that idea, namely to say it's wrong. I'll find it for you. The point was along the lines of what Grames said above. I see this as existence and identity are the same thing essentially, and inseparable. If something exists, that means it is acting, always. Simultaneously.