The most important thing is ensuring that the community has representation on the board and other governance structures. There are some organizations like the Apache Software Foundation that do an OK job at this, there are others that don't even offer projects/maintainers seats on the board.
There are also organizations like the Linux Foundation and Eclipse Foundation which essentially act as "Foundation as a Service" and host multiple foundations in one with different governance structures.
https://www.linuxfoundation.org/blog/2020/05/building-a-succ...
https://en.wikipedia.org/wiki/Donald_J._Trump_Foundation#Div...