Mon Calamari
MC90 Star Cruiser

A large warship designed for the New Republic, with the capability to challenge Star Destroyers.

External resource: Wookieepedia

Known Examples:

Mon Jolsuxas: New Republic - Active
Stationed at Nearpoint as the base's main defence.

Nautica: Rogue Squadron - Active
Assigned to Rogue Squadron as its flagship in 51:3.