This is Joe Gags (pictured below) but it's an more "recent" photo of him than Fosco's. Not really sure what Palermo or Adducci look like so I can't really discount them either. Fischetti seems to be a popular choice for open-shirt guy so no real argument from me there. I thought that cigar guy was Messino for a while but switched it to Mad Sam and I'm maybe a little too unreasonably confident in that guess.