I can account for... five? If you count the Grand Inquisitor too.

[Grand Inquisitor, three on Malachor, and the one Ahsoka had defeated to make her lightsabers.]

But we had all of them after us and then... nothing. The Empire knew of our position and sent a Grand Admiral. They're gone. Why else would the Inquisitors suddenly stop inquisiting?

Also, you're kinda being complacent yourself. You don't wanna teach someone because you're afraid they'll fall. If your padawan is tempted by the dark side, it's your responsibility to support them and help them find their way back to the light. You're giving up before you've even tried.