Monty, digging through the Army TOE (Table of Organization and Equipment) pages, I find that, for instance, the assigned strength of a AH64 (attack helo) batallion is 25 Com, 45 WO, 106 NCO, 162 EM; of a CH46 (heavy cargo) is 47 com, 88WO, 290NCO, 387 EM; and so on and so forth. Since the Commissioneds are the actual unit commanders and are likely to be also in non-flight administrative positions, it’s reasonable to assume the operational flying billets are heavy with WOs
This page is the specific TOE for a AH64 Apache Company:
And for a Blackhawk Company:
You can see that the overwhelming majority of the assigned billets for pilots/safety officers/ops officers call for W2/W3. I believe we may safely extrapolate that a majority of actual day-in-day-out fliers are WOs.
This of course only applies to RWAs. I’ve found nothing for the Army’s FWAs, but they’re but a relative handful anyway.