The only ships with large energy mounts are Paragon, Odyssey, Apogee and Sunder. I think all of those ships can use any of the large energies (ignoring paladin) effectively, except the sunder has to use SO to support PC. Apogee does not need SO to run a plasma cannon. Max dissipation with a single PC and token PD along with all the shield and range hull mods is by far the best apogee loadout IMO.
The paladin is quite sad indeed, thankfully it's getting some love this patch.
Regarding all large-energy-mount-capable ships, right. They can all sort of work with the current vanilla variety of weapons, I just wish they had more options to be perfectly honest. Assuming all ships have token Point Defence, Ballistic only ships are amazing and missile only ships do disgusting amounts of work as long as they have ammo.
Energy only ships on the other hand only work because
1) the AI just likes taking the shield down when it mistakenly thinks its far enough away
2)The enemy ship can't handle the flux beams generate and probably is worth less FP individually anyway
3)your ship has such an overwhelming flux dissipation/capacity advantage over the enemy (looking at you Paragon) that it can just keep trading with its poor efficiency, high DPS weapons until the enemy is dead.
If none of those situations occur, energy only ships just stop being useful without kinetic damage sources (like sabots) and your once totally viable laser Sunders and Autopulse Odissey get run over by [Redacted] like a monster truck driving thru speedbumps. I'm not saying some energy weapons, namely beams, need a buff (not in this particular post anyway), but the fact that they, unlike the other two weapon types, can't muster up a truly universal (but also flawed) role speaks volumes on their lack of variety.
P.S: Plasma Cannon is probably the best thing you can slap in a large energy slot provided the ship can both sustain its flux and get close fast enough to use it while still in one piece. I simply like safety Overrides on the Apogee for the very biased reason it can keep pressuring ships that would otherwise be harder to keep up with and finish off. Then again the last time I used a Plasma Apogee it was without using Salamanders, it definetly was not a smart choice.
Edit: typos have been purged with a flamer