>>1068141 (OP)
I'd look at the default ublock origin lists, IIRC uBO syntax added hostfile entries to the ABP format, so I think it should be easy to write a script to pull out those.
Also, maybe ask Fusl and others on IRC what Blacklists they have used successfully on their DNS servers.
Looks like at least 7 different people run blacklists on their servers:
https://servers.opennic.org/