Benedict Arnold
Brutus
Judas
Judas Iscariot
Quisling
Vicar of Bray
apple-polisher
archtraitor
ass-licker
backscratcher
backslapper
betrayer
bootlick
bootlicker
brown-nose
brownie
careerist
chameleon
clawback
cockatrice
conniver
conspirator
conspirer
courtier
creature
cringer
double agent
double-crosser
double-dealer
dupe
egotist
fawner
flatterer
flunky
footlicker
formalist
fortune hunter
groveler
handshaker
helot
hog
individualist
informer
instrument
intrigant
intriguer
jackal
kowtower
lackey
led captain
opportunist
self-seeker
Cyclades
backslider
blackleg
blackmailer
defeatist
draftsmen
druggies
enslaver
fellow-traveller
hireling
infighting
interloper
opportunism
paleface
picker-up
prating
readmission
revolter
sanctimoniousness
schemer
shirkers
traducer
traitress
yoking