We all know that the "Rule of Two" was oft violated and in an audiobook I'm listening to it seems that
- Even Darth Plagueis' master didn't obey this
- It says "precious few" Sith Lords did
I am wondering if someone who has read more of the books may be able to actually count how many Sith Lords did abide by it?
Presumably Darth Bane was the first to do so and Darth Sidious did, so that's 2, but how many more? To keep things simple let's count the number of masters who followed the rule (not the apprentices).
If an exact count isn't possible, maybe we can at least narrow it down to a range based on the chronology.