ringleader (n.)
- agitator
- agitprop
- bellwether
- boss
- cacique
- catalyst
- choirmaster
- choragus
- conductor
- demagogue
- duce
- firebrand
- fomenter
- forerunner
- fugleman
- incendiary
- inciter
- instigator
- leader
- messiah
- mischief-maker
- pacemaker
- pacesetter
- precentor
- provocateur
- provoker
- rabble-rouser
- rouser
- sachem
- standard-bearer
- torchbearer
- troublemaker
- urger