Merlin + EC725
Military EH101 has fuel dump (but I think it melts some glue or something). I think the French have a Super Puma which dumps an internal aux fuel tank overboard on a button push.
However, just love the comment that weight reduction wasn't a factor in helicopter operations...probably not if you're just flying rubber dog doo from a to b...but for doing anything useful its great....just pray your master dump shuts when you tell it to.