Most enthusiasts on [H]ere are probably familiar with the idea, change your isp assigned DNS to another provider for speed and privacy. OpenDNS had a similar service for years for blocking adult content, although it was bought out by cisco and they are pushing paid services now. Cloudflare ads Malware filtering to the mix. I've used 1.1.1.1 for years and it usually comes in the top 3 in DNS Bench testing. As a bonus they have a tutorial on configuring DNS over TLS for routers running OpenWRT.
TLDR:
Speed
1.1.1.1
Malware
1.1.1.2
1.0.0.2
2606:4700:4700::1112
2606:4700:4700::1002
Malware and Pr0n
1.1.1.3
1.0.0.3
2606:4700:4700::1113
2606:4700:4700::1003
TLDR:
Speed
1.1.1.1
Malware
1.1.1.2
1.0.0.2
2606:4700:4700::1112
2606:4700:4700::1002
Malware and Pr0n
1.1.1.3
1.0.0.3
2606:4700:4700::1113
2606:4700:4700::1003