OpenDNS uses blocklists, I believe. It's one you would use for parental controls, etc.
I would try US level 3 servers from 4.2.2.1 to 4.2.2.6
They're about the same speed as google, cloudfare and quad9
Simple DNS is a free program to set your DNS servers if you run windows. You don't have to take the fastest one if you run a test and google is the fastest, just highlight a US Level 3 server and apply that. You can also type in a DNS server manually.
DNScrypt is a good idea, too. Run it and set 127.0.0.1 as your DNS, but don't set 127.0.0.1 if DNScrypt is not installed or running!
Other thing to check is what your DNS router uses. May want to disable router DNS if you have a good DNS setup in your network. If you know your way around, pihole does a good job in this regard.