Just in case they are useful. Some of these I never heard of.

Provider Primary DNS Secondary DNS
Google 8.8.8.8 8.8.4.4
Quad9 9.9.9.9 149.112.112.112
OpenDNS Home 208.67.222.222 208.67.220.220
Cloudflare 1.1.1.1 1.0.0.1
CleanBrowsing 185.228.168.9 185.228.169.9
Verisign 64.6.64.6 64.6.65.6
Alternate DNS 198.101.242.72 23.253.163.53
AdGuard DNS 176.103.130.130 176.103.130.131
CenturyLink (Level3) 209.244.0.3 209.244.0.4
DNS.WATCH 84.200.69.80 84.200.70.40
Comodo Secure DNS 8.26.56.26 8.20.247.20
GreenTeamDNS 81.218.119.11 209.88.198.133
SafeDNS 195.46.39.39 195.46.39.40
OpenNIC 198.206.14.241 172.98.193.42
SmartViper 208.76.50.50 208.76.51.51
Dyn 216.146.35.35 216.146.36.36
FreeDNS 45.33.97.5 37.235.1.177
Yandex.DNS 77.88.8.8 77.88.8.1
UncensoredDNS 91.239.100.100 89.233.43.71
Hurricane Electric 74.82.42.42  
puntCAT 109.69.8.51  
Neustar 156.154.70.1 156.154.71.1
Fourth Estate 45.77.165.194  
Tenta 99.192.182.100 99.192.182.101