If you include his MSU days, there were several. Bobby Williams is the only one I can think of off the top of my head. But he was fired so I guess he doesn't count.
Yes, I know about him. I just can't think of any others that are current. You would think there would be more.
But didn't Williams come to be a part of Saban's staff AFTER getting fired by MSU? If so, Derek Dooley is pretty much the only one that you should be able to count as he was a former Saban coach that "worked his way up" instead of "head coach that took a demotion".