Before Holtz got the boot he built championship teams by recruiting the big uglies on the O and D lines. The O-line guys were human road graders that could move the pile and had no problems in the RZ. Behind them were backs that punished would be tacklers. Take a look at who's doing that now days:
Saban
Meyer
Swinney
Fisher
and a few others that are coming on with more power than option.