it would be better to distinguish between three (or maybe two) kinds of great juventus players. mind you players that are still playing for juve could deffinetly change category
The first category it would be great players who played for juventus, people like Zidane, davids, trezeguet, ibrahimovic, thuram, cannavaro
The second category would be players who gave 110% every time and accepted to be part of the bigger picture (which it did involve them being on the bench). players like birindeli, conte, tacchinardi, pessoto and many more.
now when Great Players that play for juventus give constantly 110% they become legends besides del piero, nedved, thuram, buffon, camoranessi, zambrotta, are some of the options, viera and emerson following them closely. now in order for all of them to truly become juventus legends they need to show their worth for several years 4 or 5 at least.
in memory of swag aka greg

here's my $ .02