the beauforts are tricky period as some are also considered heavy fighters
Doing some quick Googling on RAF Coastal Command (an easy one, as pretty much all their bombers were used either for anti-ship operations or aerial minelaying, so likely to count as NAVs), their twin engined bombers included:
Beauforts (also heavy fighters and tactical bombers)
Beaufighters (also heavy fighters and CAS)
Blenheims (also heavy fighters and TAC)
Mosquitos (also heavy fighters and TAC/CAS)
Handley Page Hampden (also STR, not sure about TAC)
Avro Anson (as far as I can see, mainly a trainer but also did some NAVving early on)
Consolidated Catalina
Lockheed Hudson (I think also a TAC, but not as sure about this)
Vickers Wellington (also TAC/STR)
I'm not familiar with the set-up for the US, Japanese, German or Italian anti-shipping units, but can go looking if that'd help? I suspect we'd find similar issues in most cases of aircraft used for multiple roles, making a clear 'count' tricky (not impossible, but it'd be a lot more fiddly than just looking at the total number of aircraft of each model produced).