Welcome to BYC - I am so sorry your thread slipped through the cracks, that happens on a busy forum such as this so sometimes you have to be the "squeaky wheel" by bumping your thread up off the never-never land of page 2 or beyond. Your last post definitely sounds as though you have reached a point of frustration, and I am sorry that your first experience here was not a better one.
#2 is, indeed, a sebright -- good job sorting that out yourself.
Can you get pictures of #1 and #3 in natural, standing positions rather than being held -- there are parts of the birds that can't be seen here that factor into breed IDs. Also, if you can get a nice comb shot or describe the type of comb they show they are going to develop.