I think horse five is by far the best. Although he may have a little upright shoulder, his back is of good length and his humerus is nice and short. He appears to have a level top line and good thickness of bone. Although I would like to see shorter cannons on his back legs, his front cannons are of a nice length. His neck appears to be of good length and he seems quite balanced overall. I would definitely buy this horse.
I don't know if you just want which one is the best, or if you want them in order do I'll go ahead and do the latter.
First choice would be number 5 for the reasons I said above.
Second choice would be horse 6. I chose 5 over six because even though 6 has a more sloping shoulder, he has a roach back and some fairly upright pasterns on his front. He also has a more equal forearm to cannon ratio which is less desirable.
My third choice would be horse 4. I chose 6 over 4 because 6 is much more balanced overall. Horse 4 is uphill and appears out of balance between the fore and hind quarters with the shoulder much more muscular and larger than the hindquarters. This hire also has a bit of a long back and is sickle hocked. Although he ha a nice sloping shoulder, he appears thick in the throat latch which can interfere with his breathing upon flexion of the poll.
4th would be Horse 2. I chose 4 over 2 because 2 has a much more upright shoulder. Although he does not appear sickle hocked like horse 4, he appears over in the knees and swaybacked. He also has a similar balance to horse 4.
My fifth choice would be Horse 3. He is quite downhill which is undesirable for hunter/jumpers. He also looks wasp waisted with the same issue of being heavy on the forehand. Because of his shadowing, I cannot see his shoulder. His legs appear to be good.
6th is horse one. It is had to tell much from his back because of the saddle on him, but I suspect that he is downhill though not as much as 3. He also appears sickle hocked, and goose rumped. He also has a roach back. His shoulder appears very upright, although again it is difficult to tell due to the saddle. I also suspect that he is over in the knees.
I would place horse 7 last because he is very unbalanced and his whole body makes me question his ability to remain sound. He has a long back and weak coupling that attaches to a severe goose rump. His undermuscled neck ties in low to a pidgeon breast and appears to have a narrow throat latch. He also seems tied in at the knee. Due to these conformational faults, I do not think he would remain sound under normal riding and definitely not under the stress of jumping.
National Horse Bowl Reserve Champion Individual