Thug or Ninja with Storm do crazy damage. But may be a little too crazy in the sense that the pets die so easily without having the benefit of some more defensive secondary powers. Taking one step towards to the safer end of the balance, Demons and Zombies (proc-heavy) may be more palatable.
Also, historically Bots and Storm are also a thing. In the Pylons thread of this forum, someone use Merc with Storm to great effect too.
In my view, steamrolling also implies not dying so frequently - or at least needing to heal regularly - which means more time and endurance for dealing damage.
After all, Storm is a very offensive set to the point where the margin of using different pets is almost academic. Alternatively, I have heard Dark and Illusion controller pair with Storm very well too.