RWE,
I think the Osprey, with it’s speed and range, overall would probably be the best platform for this. But it’s awfully expensive.

“Note also that “rescue” to the USAF is no longer just aircrew retrieval but such choppers are also used for special ops pick-up for any service.”
Yeah, that’s a two-edged sword. If you over-specialize, you end up having resources that don’t get used to their fullest capability. But if you over-generalize, you get resources that can’t do their mission adequately.
I would be curious to see how the Blackhawk/Nighthawk fared in the competition (I assume that some version of it was involved.) The Navy has been pretty successful with modularizing the equipment suites on the multiple versions of the Seahawk that they use; makes it relatively easy to switch from one mission to another.