You mean apart from the Centauri, the Minbari, the Narn, and the many other minor races that were on show during the series?Yet Babylon 5 was far more , far more than just fire power . Anybody that has watched the series knows this .
Babylon 5 is about finding our own way . Both the Vorlons and the Shadows were kick out of our space . The first one lead them both away from us into space . We are now on our own , Humanity .
The whole purpose of Babylon 5 (the space station) was an attempt to be a meeting place for the many races, a neutral place for diplomacy and trade, given the many inter-species wars. With humanity being the mediators / facilitators etc. It was as far from being about humanity being on our own as you could get.