Do we know for sure who played which Stormtroopers in the Carbon-Freezing Chamber scene in ESB--specifically the ones standing by Fett and Vader?

There are a few actors signing photos of those shots, and, from what I've seen, they all say they're in the shots they're signing.

We've seen a number of actors who, for lack of a better term, exaggerated their role, and it wouldn't be too hard for someone who played a Stormtrooper elsewhere in that scene to point to that iconic image and say "that's me".

If nothing else, what's the community consensus on who's in those Fett/Vader shots?