Perhaps the third is a European Herring Gull argentatus argentatus, and maybe one or more is a large very pale Lesser.
Opinions are welcome.
I did not get to see any of these birds. All photos were taken by the amazing Patrick Comins at the amazing Manchester landfill near Hartford Connecticut, which is no longer open. This bird was seen at the Manchester Landfill in March, 1999. It was apparently an adult bird. The leg color stuck me as sort of a fleshy pale yellow color, with one of the legs being distinctly yellower than the other.