The biggest people I've ever met that were exceptionally strong were big eaters and lifted a ton of volume. I trained in with some guys who were into strongman many years ago, i know most of them were juiced but a couple didn't seem to be. These guys ate everything in sight and trained for 2-3 hours 4-5 days a week, but their intensity was varied, not all workouts were heavy or intense. This is where i learned progressive loading and speed versus max effort. They very rarely lifted above the 80% ME range, most lifts were compound sets focused on explosive speed. Lots of heavy carry exercises, grip holds, loading relays and pulling exercises. One guy had a small farm and on the weekends they would carry logs and bags of sand. Nothing you typically consider a bodybuilding workout. But these guys were strong as hell. Would eat 6k calories a day easily but a lot of fast food, they weren't big into health. They were a bit fat, but they would cut weight for power lifting and strongman competitions; most of them were around 250-280 but would compete around 220-242.
The guys you see lifting crazy weights these days are on a shitload of drugs, it's insane. If you just look at the weight fluctuations in most strongmen like Eddie Hall, Shaw and Thor you will notice. They always claim to be "cutting" or "taking of lifting" for while, but in all seriousness they are taking time off from the drugs so they don't have a heart attack. Plus they are monitored by doctors and know when to push and when to chill out.