yeah, but personally I think delpo is the more legit 4th member of this 'big four' club
and I answered no to the poll because the OP seems to be directly the topic to mainly 'big slam players' but if we're talking the general sense of the tour, certainly Murray is in that upper echalante far away from the rest of the pack. maybe he hasn't won a bunch of slams but how many SFs and finals has he made? a shit load. how many masters has he won? if we consider things overall certainly he deserves to be considered the top tier, or 'big 4'. I suppose it could depend on your persepective, but in every field you could rate him versus players below him in the rankings, he has better records.