Theoretically C-130s, which Israel has, can drop these too by opening the back ramp and pushing them out.
But a C-130 would be a sitting duck for Irans air defenses. As would a B-52.
The only realistic option for using these against Iran are the B-2s.
A MOAB is a “get close” weapon.
MOP is a precise weapon that needs release cues other than a grease pencil mark on a windscreen.
Right now, the B-52 is the option, with B-2’s coming along.
Strike packages are many aircraft to support a mission, not a single aircraft.