Hummingbirds are aggressive for a good reason—they may have to travel far once nectar is depleted, so they can’t afford to share flowers when there aren’t many blossoms to choose from. Because of how ingrained this hatred is, they are unable to distinguish between feeders and other animals.
Overall, placing four tiny one-port feeders rather than one large eight-port feeder will allow you to feed many more hummingbirds. The birds won’t have to see one another, which might otherwise arouse their territoriality. Spread them out. They’ll be happier, and you’ll get to observe them through more windows.