Romulans are non-historical as well. Romulan ships never visited the Hydran front (which, during the time when Romulans were involved in the General War and could safely travel past the Tholians, largely consisted of Lyrans attempting to bottle the Hydrans in with Klingon support).
Lyrans can be dealt with by a careful Hydran fusion ship. An ESG ram hits everything in the hex, which means that if you stack your fighters in the hex with you (or adjacent to you depending on where the fighters and the Lyran are located) the strength of the ram is greatly diluted. Then you blow the guy up for being reckless enough to move up next to you and all of your fighters. ESGs are the one time when launching your fighters too late for them to fire during the battle pass actually makes sense.
Hellbores take advantage of the "auto-hit" rule when ESGs are up. Or hit for full power if the ESGs aren't used. And Phaser-Gs at point blank range still hurt regardless of whether Fusion Beams or Hellbores are the primary heavy weapon on the ship.
And amazingly enough, the Fusion Beam and Phaser-G actually outrange the ESG...
(yes, I know that it's hard to believe that there's a weapon even shorter ranged than the Fusion Beam...

)
The LDR is another matter entirely, but they're not an historical opponent (there's a reason that the LDR has all of those Phaser-Gs to place on their ships).