Wipr. I've used adguard and 1blocker and while they're both pretty good, I prefer Wipr for its simplicity and works very well. Adguard and 1blocker are more configurable but I don't need those features as wipr rarely breaks websites. If it does, the developer is fast to respond with updating rules.
Adblock Plus is built into Microsoft Edge on iOS and it works very well. I've always been a little reluctant to install the standalone Adblock Plus app for Safari because it hasn't been updated for a few years? ABP works great on my PC, it's the first extension I install on all my browsers. For Safari I was pleasantly surprised to find out that the MalwareBytes app has free adblocking and it seems to do a fairly decent job. If you sign up for premium it will also block malware sites etc. but that's not required.