Corvettes:

The smallest ship in the fleet, the angel is overpowered by almost anything, but in numbers can cause a lot of damage

the other 'small' corvette in the fleet is the Artemis, largely designed as a hit and run support craft, the ship boasts a new warp system which allows it to move accurately from place to place rapidly. a smaller, more faster version was proposed, but the vibrations from the beam made it literally rip itself apart.
Destroyers


The striker is technically a corvette, due to it's lack of accurate firepower, but it's size classifies it as a destroyer, a decision made after the name, which is why it says corvette in the photo. This craft is one of the only ships that can keep up with, and punish enemy fighters and corvettes.

The aegis is just a run of the mill destroyer with adequate weaponry and no real history surrounding it.
Cruisers

The Revenant Cruiser is mainly a fleet level support craft, with beams capable of cutting a swath through the most powerful armor in a matter of seconds. Also having a vulnerable engine area.
Dreadnoughts

One of the first ships created for this fleet, the 'Dragon II' design was almost scrapped if it hadn't been for 'the incident' that occurred when one of the gravbeams on station omega malfunctioned and allowed one of the frequent meteors showers to fall on a course toward the space station. the only non civilian ship in the was a DragonII and completely blocked the station with it's heavily defended sides until an evacuation could be mounted.

The salvation is relatively small for a dreadnought but it's powerful main battery and heavy frontal armor AND the ability to teleport, make it a ship unlike any other.
Experimentals:
I"ll add these at a later date.
Criticism is welcome!