Hello and Welcome To BYC! The first and last ones look like they could be Silver Laced Wyandottes, the blackest one could be a Black Sex Link (Black Star) the yellow chick could be a lot of things, maybe A White Plymouth Rock or something like an Amberlink.
The black one looks like my black copper maran hen. I may be wrong though. However, the green tint to the feathers looks almost identical to my Sophie. I did notice though that there are no feathers on her feet which may mean I'm wrong.
Sophie, my maran hen, is totally black with a slight green tint to her wing feathers and has feathers on her feet as well.