I actually was thinking along a similar line recently! Im not dead set on this list.
To define the terms in how im using them:
Inconsistent is a group who's actions do not seem to line up with the stance they claim today.
Separatists believe that the ones they separated from are not members of the church.
Resistors (resist from within) believe that the ones they are resisting are heretics but still members of the Church until some future point (like an ecumenical council as one example though not the only theory)
The line between Rigorist and Moderate Separatists is three main questions: whether the question of grace is the right question or if we should focus on separating from heretics and leave the rest to God, whether grace left the state synods gradually or immediately, and whether there is grace among other True Orthodox or not.
The line between Rigorist and Moderate Resistors is whether to only stop commemorating local heretical hierarchs or to fully wall off and cut off communion completely.
Consistent Rigorists Separatists:
Matthewites
ROAC
Inconsistent Rigorist Separatists:
Bostonians
Vitalyians
Romanians
Consistent Moderates Separatists:
Avlonians & Co.
GOC-K & Co.
Consistent Rigorist Resistors:
Cyprianites
Serbians under Artemije
Consistent Moderate Resistors:
Non Commemorators among State Synods
Inconsistent Moderate Resistors:
Majority of the Athonites
Ephraimites
ROCOR-MP
Personalities such as Metropolitan Neophytos of Morphou, Metropolitan Seraphim of Piraeus, and Metropolitan Hierotheos Vlachos ect.
Unknown:
Old Brotherhood of Esphigmenou?
Lamians?
Other Auxentians?
ROCANA & Co?
I think to your observation there was at least four different camps among Rocor in before the 1990's. What you called the Rigorists I believe would become ROAC. The Liberals who i call the Inconsistent Moderate Resistors, these would become the Rocor-MP. The ones you call the Moderates i would split into two groups: the ones who agreed with the ideas of the Cyprianites and encouraged union with them, and the ones who held that cyprianism was a faulty theological opinion that should be ignored. That last group split into two, one leaving and becoming Rocie and renouncing cyprianism and the other remaining and encouraging union with the GOC-K. There is a real case to be made that in Rocor-A today there remains two camps: Consistent Moderates Separatists who disagree with cyprianism and Consistent Rigorist Resistors who still believe in cyprianism.
Thoughts?