machinator (n.)
- betrayer
- calculator
- cockatrice
- coconspirator
- conspirator
- double-crosser
- double-dealer
- exploiter
- finagler
- informer
- intriguer
- kingmaker
- maneuverer
- manipulator
- operator
- opportunist
- plotter
- quisling
- rat
- schemer
- serpent
- snake
- strategist
- tactician
- timeserver
- traitor
- treasonist
- trimmer
- turncoat
- wire-puller