Here's a better resolution one
You are just right with the identity of the ones you've mentioned.
As for the others: the guy between Pelham and Kemish, I thought he could be one of these three:
William Clark (40)
William Nutbean (30) -although he was 5' 9" tall, and our fellow doesn't really look that tall-
Albert Street (25)
Regarding the first one, I haven't found a picture of any firemen that resembles him. From all those firemen and trimmers who don't have a picture online, considering age and any other available data I'd dare to guess he could be any of these:
George Combes (34), John Hagan (35), Frederick Harris (39), James McGann (29), John Moore (29), Charles Othen (36), John Pearce (33)