I'd have Bruce a level below those you mentioned. Stam, Vida, McGrath and Rio were our best center backs bar none. Each one of them fantastic players individually that have proven themselves time after time and were the pinnacle of our domestic success and that in Europe.
Then comes the Bruce, Pallister tier - great on their own but not as complete and as dominant as those you mentioned.
Having said that and considering the defences of today have no doubt Bruce will be a world class CB and one of the best currently.