I love your work, Hodger, but I just hope that your readers understand how difficult it is to make comps that hold up to scrutiny. To be most accurate, one would need to include a wide assortment of variables other than those included here and then weight these variables in some fashion.
For example, one might want to include how successful a coach is at winning with the talent they have. One could calculate wins per average player ranking or similar. You'd have to figure out how to address players recruited under a previous coach.
@formerlybis included some interesting analysis with efficiency scores and, rightly, included the year before the new coach for comparison. Of course, the players change every year so one has to determine how to weight that. A coach gets 'credit' for players they recruit but how does one determine what to do with stats from those players they inherited?
Unfortunately, someone could put together a huge spreadsheet of variables and weight them according to a formula agreed upon by 67% of GopherHolers and we would still find that the wins/losses, as expected, are all that matter.