You could work out some sort of 'goals deflation' over the decades and adjust for that. Then put everyone's goals in real goalsIn modern footy 50 goals is a banner season for a KPF.
600 goals averages out as 12 seasons of 50; that puts some context on just how impressive 600 is
That some player, and that’s before we talk about the man, the captain, the icon who bleeds our colours