Just so I'm clear, history only counts within a certain time period?
You know pretty much any PL club can point to this that and the other to "prove" how "big" their club is, for example, one such table shows Sunderland as the 6th most successful club in England..................
There are a lot of clubs who have won stuff since you lot did, Norwich, Luton, Birmingham, to name just 3, and only an utter bell could claim they are "bigger" in any way to NUFC, but the fact is, they have won stuff, and you have not.
I always reckon a better idea on looking at how big a club is, is changing the word "big", for "influential", in other words, how important to the overall English league they have been. For example, the number on managers that have graduated via SAF would point to MU being pretty influential in the English game, ditto Wenger/Arsenal and the way he pioneered international scouting, and the business model they have there. On that basis, based just on the players that have come through NUFC over 20 years or so, I reckon you have a decent claim to being one of the more influential clubs in the country.
Also, love him or hate hem, when Hall/Shepperd redeveloped St James, right in the city centre, that again showed a better way of developing a ground rather than some out of town dinkey toy effort that we have all to many of these days.
Just my thoughts.