A giraffe comes to mind. Let's think about it: What other animal needs its blood to travel such a long distance from heart to brain, surpassing gravity's effects?
And for fascinating facts about giraffe blood pressure: http://www.chaffeezoo.org/zoo/animals/giraffeheart.html Amazing that it's only 175-200mmHg - I've seen humans with higher blood pressure than that, which is really scary.