damn so this is the SECOND "loyalist" that has came up with the idea of killing the emperor to FREE him from the golden throne. i didnt know that this was before the lions return in chronology
In old skool lore there were Renegade Marines. Not Chaos Worshippers but Marines that simply weren't following Imperial Orders anymore. These days it's much more Loyalist or Heretic but Cypher can certainly be seen as a Renegade more than a Heretic.
Subscribing right away, also I have theory that GW is a Cult imperialist slowly trough the years to spread the words masked a board game. While most of the lore is suggesting that human coaligns must follow some of the harshest paths I believe that's the way