I am no Broncos fan, and even less a Hunt fan, but i rate him and Brett Stewart very highly, based on their defensive, postional game and being pretty safe under the high ball. They are probably the 2 best at the moment for me, not counting Mini in that because he hasn't played.
As for who is number 1 out of them, i would have to go Stewart probably. Has been doing it all this season, scoring his tries, line breaks, catching the hard balls under pressure, and defensively gone to another level, always in the right place, held Mason up twice in 1 match, and that tackle on marsh last week was something special