vorlons are powerful, more so with the new armageddon supplement but dont get any ships with that until raid level. they have nasty weaopns, all beams but all weapons fire forwards. also adaptive armour and self repair on all ships can make them very survivable.
the minbari are a standoffish race, using their beams and mini beams, ignoring interceptors whilst hiding under their stealth. some very good weapons but if they get hit back they have alot lower damage thresholds than most the other races.
EA are the jack of all trades, they have pretty powerful beams but they are all boresighted. they use alot of missiles at certain levels which can be very dangerous. they tend to have god solid ships with all round firepower if not a bit slow, also alot of ships have interceptors for defense. they can be one of the most powerful fleets if built and used right, or one of the weakest if not. also alot of ships have fighters, nova dreadnought is good example, riad level ship with all round firepower and 4 fighter flights.