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I wonder what surviving human held the record before balloons (excluding edge cases like jumping gaps on a mountain bridge). Probably it was someone falling from a cliff into snow or water, but maybe it involved something weird like a gunpowder explosion or volcano.
I thought this was a beautiful way to see our progress out in one frame. Then I thought, what about human object reach? So Voyager 1 would be about three more log ticks up at 25 billion km (about the top of the nav buttons) with other probes falling below that at their appropriate times.
The pre-1800 numbers sound too low. There are lots of old buildings much higher than 10 meters high, and I doubt they were all unoccupied at the same time.