A deniable pirate force during the Clone Wars

What ships would suit a pirate gang secretly helping the Separatists behind Republic lines?

Fighters could threaten targets while a freighter carried a boarding force, but using contemporary military fighters could compromise the pirate disguise.

Z-95 Headhunters are initially suggested for hyperspace capability and firepower. A Corellian medium freighter would carry the boarding party and recovered cargo. The Z-95 choice is then challenged because it is described as a front-line fighter during the latter Clone Wars. Stealing fighters or posing as a rogue clone unit are possible replies within the scenario, but they change the intended cover story. Common, modifiable Corellian ships provide a more broadly accepted basis; CloakShapes are also suggested with uncertainty about their place in current canon. The design problem is to combine useful raiding capacity with a believable pirate identity.