Benedict Arnold
Brutus
Judas
Judas Iscariot
Machiavellian
Quisling
archtraitor
behind-the-scenes operator
betrayer
calculator
cockatrice
coconspirator
conniver
conspirator
conspirer
counterplotter
double agent
double-crosser
double-dealer
eminence grise
exploiter
finagler
gamesman
gray eminence
informer
intrigant
intriguer
kingmaker
logroller
maneuverer
manipulator
operator
opportunist
plotter
pork-barrel politician
quisling
rat
schemer
serpent
snake
strategist
tactician
timeserver
traitor
treasonist
trimmer
turncoat
wheeler-dealer
wire-puller
criminal
crook
felon
malefactor
outlaw
Fawkes
Oates
guy fawkes
titus oates
adventuress
arranger
contriver
coordinators
decision-makers
forager
intrigante
marplot
pilferers
preparer
wisher