Different positions (assuming you're comparing Zion with Sherko). The only OL that could have supplanted Sherko would be McDonaldson but it would be close based on his inconsistent play.
You are crazy.
TS >>>>>Maxey/Marshall (it's disingenuous for you to even mention those dudes in the same breath) and I'd even say Jennings. If we had him here for more than 1 season, I would probably bump him over Rolle as well.