Given that the Banite line did what no other Sith Empire could, I would have to say no. The Rule of Two was an excellent solution to the infighting of the Sith. ]
It did do what no other Sith Empire did, but at the same time it's success was very short lived. How long did the Galactic Empire last? 20 years? Not counting the Remnant, I mean the full Empire. In some ways I'd argue that Marka Ragnos was more of a success than Bane. He may not have conquered the Republic, but his empire lasted longer and wasn't wracked by civil war. Oh, and an aside, I love your "An in-depth look" threads.