A good pilot in anything with a hook on it could place a line, with a cage or scoop net, onto a roof top have people hop in and then fly them down to the ground. Obviously want VFR but as long as you are out of the smoke, and generally smoke doesn't go directly up in these fires, often one side/corner of the building is reasonably clear.
Lots of problems and issues with it, i.e. access to roof top, too many people trying to get in at once etc, however if the building is reasonably stable, you fly one fire fighter/crewman up they coordinate loading people and you get into it.
I would guarantee that a JR or 500 short hauling on a hook, will get more people off the roof faster than any heli out there winching, simply four or five jump into a cage within 30 secs-1 minute they are on the ground and the cage is going up for another load. Obviously a bigger cage under a bigger helicopter would be faster again. Imagine how fast they could get people off a roof 20 at a time under a 92!!
Helicopter goes nowhere near the roof, so less worries about wires, aerials etc.
In a big city with lots of high-rises you wouldn't even need to take them down to ground level, it would be quicker to just fly across the road to the next rooftop, let them off there and coordinate evacuation from that building...