OL will be the best since David Molk was around, and with another leap, it's possible they could become as good as the unit from 2006/7. The 2019 tackles may never be elite draft picks like Jake Long** but this could be the best Michigan's been up the middle this millenium. Bredeson, Ruiz and Onwenu are a load. And I feel good about Bredeson and Ruiz continuously improving. The uncertain one is Onwenu. He's already a nimble planet and plays like it 50% of the time. Consistency is the thing and that's all condition. His challenge, though, is that (at 6'3 - 350) he can't afford to take any days off with his weight if he wants to improve his endurance.
**(Runyan doesn't have much of an NFL future. He's crafty, and his game is entirely fine against all but the top 10% of DEs. The guy starting opposite him could be an elite future NFLer, but we don't even know that guy's name yet, let alone ability, so for now I'm assuming they'll top out at "Big Ten average" and even then Michigan would have a great line by recent standards, albeit with this blemish).