Tosh's Goons are a mercenary organization led by Gabriel Tosh. They were creating spectres at the Avernus Station using terrazine, jorium and a psionic waveform indoctrinator.
Plot branch : Raynor's Raiders side with Nova against Tosh (B canon)
Raynor's Raiders reneged on previous cooperation with Tosh and helped Nova, a Terran Dominion ghost, to shut down the Avernus Station operation. Afterward, Tosh was assassinated by the ghost.
Plot branch ends here
They had access to battlecruisers and thors, and kept ultralisks captive at Avernus.