I’m not sure if the video was ever online but probably the best tackle I’ve seen was Lincoln Withers on a Matt Utai kick return. Utai at the Dogs but can’t remember which club Withers was at.
Not sure if anyone else saw/remembers but he was first to meet a rampaging Utai with a full head of steam in his prime, and picked him and drove through with the legs. Withers was a small bloke but it was ruthless.
It probably doesn’t qualify in terms of hurt on the defender but it was a great tackle and the type you’d coach young kids rather than lining up and blindsiding guys like a lot of these.
And by the modern era I pretty much mean everything after Inglis almost killed Dean Young and got the shoulder charge banned.
Watching some of these videos, f**k me. Bring back the shoulder charge. Stupid rule. If there’s contact with the head, penalty, otherwise play on. Got sent off that many times playing schoolboy rugby for shoulder hits and they make for great spectating.