If the information in this link is true of your breeding, then the fully barred bird may be a pullet, despite having a comb and waddle (since BR's seem to often get those early on).
http://www.backyardpoultrymag.com/what-breed-is-it-understanding-sex-link-chickens/
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Did you buy those from somewhere or did you actually find a way to hatch nearly all males? :) That is a tough break. Even 50% is a lot to deal with, which is why I'm so interested in breeding black sex links (using Barred Rocks) from now on.
The Red is a cockerel.
Definitely Barred Rock crosses for the other three I'd say (the one on left looks pretty much same as pure BR to me). Maybe the father was a BR and the father was a White Leghorn (or any white chicken), for example, which I think would result in the dominant white...
I've been studying the Barred Rocks, and based on the very limited knowledge I've gained in two days... he looks like he has the barred gene. I'm guessing it's being overridden by some silver/white genes? I dunno, just thinking out loud. Neck barring looks more like a Barred Rock than a...