A case could be made for any of the 3 imo.
I see the 'Devil's D' argument being used a lot against Brodeur which I don't think is totally fair. Brodeur was certainly a benefactor of playing behind a good defense but let's not pretend Roy didn't experience the same in Colorado. The 2001 team that beat the devils was STACKED. Forwards aside, their d corps had Ray Bourque, Rob Blake and Adam Foote.
Brodeur was also unique in the sense that he was actively involved in his teams defensive system and is firmly the best puck handler of all time which lead to the trapezoid. Hasek was certainly the most electric of the 3. Brodeur has an Olympic Gold as well.