Im sure others will elaborate more, with pics, probably. So, just quickly, you mentioned the angled pastern. Shoulder should match that angle. A nice sloping pastern makes for a comfy, easy to sit trot. Lots of TB's have it, some too much.
You want a shorter back, not a horse who has the head in the arena and the butt still in the stall
Good walk, nicely stepping under himself, prints of the hind in front of the front ones.
If only I could just find a five year old Indie.. she always had a nice walk and would always over reach, as well as at the trot once she was all warmed up. She was one of a kind. I think Indie's pasterns were a bit more angled than preferred though.
I'm hoping everyone here can point me in the right direction though, as everyone has been so much help up to this point.