Hi @zberke,
welcome! and thanks for sharing your situation with us 
You can find our advances on governance models in the tag governance of the forum. From there you can find references to resources such as:
- Governance Readiness Working Group, where we were discussing the questions/dilemmas that developers usually have to face when creating governance models.
- Governance Checklist, with the list of questions we identified
- Principles of Open Source Institutional Design Working Group, where we studied how Elinor Ostrom’s Principles might be applied to open source community design.
- Matrix questions+principles, which maps questions from the governance checklist with Ostrom’s principles
I think those points summarize the main advances we have been doing in the last months. We have now join forces and created the Governance Guidance Working Group.
All in all, it’s true we don’t have an exhaustive list of examples of governance models, maybe because governance models are still not explicit in common projects 
(and that is something we are trying to address).
Would you help us to identify what could be interesting to create? Feel free to drop a message in the governance forum, so we can discuss it carefully 
Regards,