Googled: 'patron saint resistance', 'patron saint revolution', 'patron saint of revolutions', attempted to find Fox's Martyrs or some kind of lives-of-the-saints book without much success. Found St Denis, apparently associated with this sort of thing at least by some people for unclear reasons.
ETA: If possible I would like a saint with whom somebody raised in the Eastern Orthodox tradition might conceivably have an at least cursory familiarity. So far St Marcellus or St Dismas seem to work best--the situation for which patronage is wanted in this case is a sort of sleeper-cell, shadow-war movement of quasi-nonviolent (or ostensibly nonviolent) resistance against a highly militaristic corporate state-within-a-state. So the people involved are in a sense conscientious objectors and if found out will probably be condemned criminals.