Not seen the list so can't agree/disagree yet, but for me some of the more obvious one's are:
Willie John McBride, nothing needs adding other than that.
Barry John, had the All Blacks running into glass walls on the 1971 tour and a points tally of 30 of the 48 scored in 4 Tests and a total of 191 for the whole tour.
Andy Irvine, fantastic international career and 274 points for the Lions.
Brian O'Driscoll, 4 times a Lion and one of the greatest outside centre's to ever grace a rugby field.
Scott Gibbs, twice a Lion and Player of the Series in 1997, when he almost single-handedly destroyed SA in attack and defence and lowered the heads of the Boks when he 'brushed aside' Os du Randt.
Martin Johnson, giant of a man and inspirational leader on the 97 winning tour, the last time the Lions won a series.
The rest would invariably as jno says be made of of the likes of Bennett, JPR, JJ Williams and Gareth Edwards, more for their exploits on the 74 tour to SA than anything else.