If you changed the stat to be coaches who have AVERAGED 9+ wins in their first 7 years, or if it was coaches who have had 9 or more wins in their first 7 years at a top school with top resources, just as two examples, then you would add a whole bunch of coaches to the list.
....name 'em........
Mack Brown had 12 straight 9+ win seasons at Texas, but struggled at North Carolina with little resources or history.
Nick Saban averaged over 9+ at LSU and has had 10+ every season at Bama except his first, yet he had to cut his teeth getting started at Michigan State.
Bob Stoops went 7-5 in his first year but then rattled off 5 straight seasons with 12 or more wins.
Pete Carrol went 6-6 his first year but then went 7 straight seasons with over 12 wins.
Chip Kelly only coached 4 years in college but had over 10 wins and averaged about 12 wins in his first four.
Steve Spurrier had 12 straight seasons with 9+ wins at Florida but he coached at Duke a few years before that.
I don't care enough to give you any more examples but the point is amply proven that the only reason Bo is in exclusive company is because the statistic is a technicality.
Once again, guess what the difference is between Bo and all those coaches?
National Championships.
Conference Championships.
Top 5 and Top 10 finishes.
Less losses.
You name it.