ringleader
2 occurrences across the corpus
King James Version
Acts 24:5
For we have found this man a pestilent fellow, and a mover of sedition among all the Jews throughout the world, and a ringleader of the sect of the Nazarenes:
KJV Apocrypha (Catholic Deuterocanon)
2 Maccabees 5:24
He sent also that detestable ringleader Apollonius with an army of two and twenty thousand, commanding him to slay all those that were in their best age, and to sell the women and the younger sort: