davey - when I go into a company to improve operations, I first look at data that exists, before I try to invent new data. I looked at world 1 and applied various sorts to the 'alltime' coach's information. I think there is more than enough information to arrive at an alltime list in these sorts based on world, especially if you know how to move info from those sorts into excel.
I did look at all ten worlds, but looked at world 1 in some detail. One immediate observation, those coaches who stayed in d2 / d3 would kill those coaches who moved to d1, with a few exceptions
By the way, just looking at those 3 criteria (nt's won, ccoy won, and ct's won) comes up with some pretty compelling top all time coaches in each world. Also, the name Oldresorter does not pop up on any of the sorts I used, except in world 8, so I am not trying to lobby for a method that might favor myself.
the nice thing about this suggestion, is it could be written into a ticket once you trouble shot it, and HD could maintain a list, and possible break it into ten season increments (generations or eras) and into divisions (d1,d2,d3).
I did a quick look and without weighting anything, using info available & using a formula I made up, my top 3 world 1 coaches were mswilson, barretchap, and joehall - a weighting of national titles would bring combalt and clone into the discussion mighty quickly.