Governance Leaders

Which projects are interesting to study for inspiration on governance-related ideas?

Some that come to mind are:

ANT - Aragon
DASH - Dash
DCR - Decred (Politeia)
DNT - District 0x
XTZ - Tezos

I also recall that pivx, zencash, perhaps a few others from the 2017 go go era were trying to differentiate on governance.