Vaadwaur ship
This "Vaadwaur ship", as so described by Lieutenant Commander Tuvok, was the first vessel encountered by the starship  in 2377, after Voyager was accidentally pulled into . 

Though perhaps not a Vaadwaur operated vessel, per se, it was identified as having a Vaadwaur weapon signature, in addition to technology from several different species. When a second ship entered the fray, it chased off the "Vaadwaur ship", before attacked Voyager and stealing several pieces of the ship's resources. ()

See also 
 Vaadwaur assault fighter

Starship classes