Mahdi
agent provocateur
agitator
agitprop
bell cow
bell mare
bellwether
born leader
boss
cacique
catalyst
charismatic leader
chief
choirmaster
choragus
conductor
coryphaeus
demagogue
duce
exciter
file leader
firebrand
fomenter
forerunner
fugleman
incendiary
inciter
inflamer
inspired leader
instigator
keynoter
leader
leader of men
man higher up
messiah
mischief-maker
pacemaker
pacesetter
policy maker
precentor
provocateur
provoker
rabble-rouser
rouser
sachem
seditionary
seditionist
standard-bearer
symphonic conductor
torchbearer
instigant
citee
ensigne
fraight
insurrectionist
lascar
leveller
mouthy
mover
rabble-rousing
souereigne
sower
victuall