JWH is underrated but I'd say there are a few props ahead of him. More if you take props as "middle forwards".
But that's good for the Roosters IMO. He's never going to be on Taupau or Taumolololololol money, probably not even on Junior Paulo money (and JWH is a shitload better defender for sure) but at his best he's close enough to being as good as those guys.
Having had Taupau in my team I’d take JWH any day of the week. Marty is a horrible defender. He made John fcking Sutton look like SBW once.