I just googled dressage pictures, and I must say, it really is hard to find one that fits the OP posted definition. While some of the horses appear to be swinging freely through the back, and noses are slightly in front of the vertical, their poles are not the highest point. It really is maddening. I can see why it's so confusing for people to understand when it's so hard to find.
This is what you are referring to however both this and the one below are correct.