I would say smobs is the one i say is definately black, most of the others i would actually say are dark bay but thats my opinion.
Really? Is there something off with your computer screen? Those are some really
black horses, and the couple that aren't that dark are pretty obviously black.
This is a very dark bay or brown horse:
You can tell by the light flanks, elbows, muzzles, and eyes. None of the horses posted in the OP have those characteristics.
This is a faded black horse:
It's a much more uniform brown color, and the muzzle is darker.
Also, with faded black horses you get the orange tips on the mane and forelock, which you can see on a few different horses in this contest. Dark bays would never have those, because if they were faded that severely their coat would be much lighter.