I think the Tengu is by far the best of the lot for pve. I suppose this could make it good for pvp too, if somewhat limited by support system bonuses. It has excellent fitting resources, durable shields, and is reasonably fast.
Drones don’t really factor into the ST equation much. The Tengu doesn’t have any. The Legion only has them with the never used drone subsystem. The Proteus has them (5-10 without the drone subsystem), but the drone subsystem is also never used. Loki has 5.
Keep in mind my take on them is strictly pve. pvp applications may be different in a way I’m not familiar with.