That's bizarre that you've not had any; I'm at 239BC and I've had five already:
Dentatus, the original faction leader
Blasio, the one who becomes faction leader
Scipio Asina, who I think is faction heir for a bit
Lucius Cornelius Scipio
Marcus Aurelius Cotta
As long as you've got patricians with high influence, you should regularly get one or two floating around, and a few who even get a second term as consul.
But for the Reformator trait, they basically need to be a plebian, which makes it harder to get elected (it's Influence that determines them).
Bookmarks