depends on eras, the Centauri are an excelent fleet choice as they have good strong ships, with few obvious weakneses, the 6AD battle laser on the primus makes it a ship to respect and fear. I wouldn't hold out much hope for an early era EA fleet against the centauri, they are older and more advanced (until recently when they have become the Mongoose equivalent of space marines)
the 3rd age fleet would be a decent matchup, more so if you consider using the Warlock as a war ship, and using its SFOS stats, both fleets have interceptors, some good guns, and of course some of the best dogfighters out their. Against a Crusade era EA fleet, I think the Centauri might struggle, but they are still a decent match for most fleets.
decent matchups would probably be
EA third age - Narn
EA third age/crusade era - Centauri
Narn - Centauri if your Narn players is a bit more experianced
Brakiri - 3rd Age EA
Narn - Drazi (seriously, death by a thousand boresights)
Dilgar - Third age EA (i reckon early ea would get their bottom spanked here)
Abbai - Dilgar. soooo many dice.
Thats just a few suggestions. The Drakh box is excelent value, apart from a probably broken mothership, but the fleet requires some finnesse as hull 4 is very frustrating. However, if you fancy something different, the Minbari versus the drakh is a surprisingly good matchup, especially with how cheap drakh scouts are.