Jonsu & Enoch just made the most infamous list.
Other than them, I can only think of a handful.
Bowie Ironsides
Allison Kabrinksi
Haruka Vanimedle (there was another character in this family that started an earlier rebellion in Niselur when I started playing but I don't remember the name)
Baal Beldragos
And did anyone mention Garret Artemesia yet?