My grandfather. He came from a dirt-poor background, so no money for gyms, or even dumbbells. But he just wandered around the docks looking for heavy objects (anchors, barrels, coils of mooring cable, ...) to lift. And also taking jobs loading ships, carrying bags of grain or cement onto vessels. He was never big (150, tops) but tough as nails. Last feat he ever did: helping my father pave a garden path. Seeing this (then) 88-y.o. frail man, weighing around 120, carrying 50-Lb paving stones was awesome to see.
Most bad-ass injury: tore an anterior delt clean off while doing dumbbell military presses at age 86-87. With 35 Lbs, mind you, which was over 25% his bodyweight at the time! RIP, tough guy.
He's clearly my biggest influence. I've got a baby pic of me standing in a bathtub, doing a front double bi pose. That must have come from him.