I really love my warmbloods and Tb's...but I just can't picture them roping, cutting cattle or doing WP.
I vote for the quarter horse. They not only excel at all of the western disciplines, but I have ridden them up to advanced in eventing, high in the jumpers, up to 4th level in dressage.........an amazing all around horse. And many are able to show in multiple disciplines at the same time.
I had a lady bring her roping horse to me. She was not showing him in roping anymore and wanted just a trail horse. Problem was, he didn't know how to pick up one of his canter leads from all that roping training. I was to balance him and teach him his gaits through basic dressage. He was a real bull-dog type QH with a chest wide enought to drive a car through.
He loved dressage and did really well. So the owner was happy and decided to see what he would do jumping. Well, judge for yourself. This was at his first event, showing novice at a large recognized event a month after starting his jumping. He loved that too!!
Oh yeah....he loved foxhunting too.
R.I.P. Wilco's Lass AKA "Toby"
American quarter horse......exceptional flexability both physically and emotionally, IMHO.