First Cycling do an approximation for older riders (mostly based on the SPP)
Of those you mention:
Van Looy 84
De Vlaeminck 58
Hinault's 85 seems to be the best of the rest
Petacchi also above 70.
53 GT stages
Also won stages in Pologne before 2005 but those shouldn't count as WT.
Seems like 100 'WT' is a barrier only crossed by Merckx