Aragon is available since last November and as a framework DAO tool you could also create token. Check the Stake token 
But yes I agree a specific NFT Framework for DAO badge’s would be needed, a easy no code solution. And I dind’t find something so far. Not sure about a tiered one but I like that idea and was thinking ealier about but may for this it’s bit to early?
Snapshot support HRC721 strategies aswell as POAP 
and yeah the framework need to build independent, also with guild.xyz we have a tool to protect Discord channels with a HRC721 Guild.xyz grant application