Brodie is lovely. ( I assume that's his name). In the first shot, winter, I thought his should did look rather vertical, but the other shots show it as average, if you ask me. As you said, QH's have more vertical shoulder, but not as vertical as say a friesian or morgan. MAany horses that were bred to both ride and drive have a more vertical shoulder, better for pulling.
I think your horse looks very nice, from what I can see. Handsome, no less.
The English saddle in the trailer shot sits kind of funny, as judging by the angle of the cinch. Something is odd about it. It may just be sitting too far back, or it may be a poor fit overall.
There was a thread back a bit about saddle fit where someone posted nine short Youtube vids from Jocum Schlesse (or was that Johan?). Anyway, one thing he talked about was that the saddle, when positioned correctly on the horse's back , should have the girth fall verticall in the correct place for tightening. Wish I could remember which thread that was . . . ?
My middle aged brain is only half here most of the time. Anyone have the other half?