There is nothing good for a parade. It takes a lot of work with any bike to maintain the slow pace of a parade. That is unless you don’t mind looking like like a doofus and duck walking a good portion of the time. Or riding figure 8’s to bide your time if you are a single rider. That’s not so easy with multiple bikes unless you practice which very few do. But just which bike, my guess would be the Goldwing since that engine won’t have to work as hard given multiple or more cylinders than the HD. And if I’m not mistaken the Goldwing has an easier clutch to operate.