Tommy Armstrong was a good QB at times and a very good athlete. He would have done much better in Osborne's offenses (post 1970s). But, Osborne would have used any of our QBs of the past 20 years better than the coaches they played under. Mickey Joseph was not a great QB or even a good one really.
Jamaal Lord was an exceptional runner in the QB spot but was borderline awful at passing. He was our run offense basically. He does not rate in NU's list of top twenty QBs in my view.
I would doubt that I would rate Lord, Joseph, or Armstrong in our top twenty QBs. Taylor Martinez (as a freshman) would likely make that list and was putting up heisman like performances before he was hurt. Never really was the same after that.
Tagge, Van Brownson, Humm, Ferragamo stand out in the 70s. Gill, Godowski are two of the very best ever. Frazier, Berringer, Crouch all played terrific QB. Not going back to look at the list, I am sure I am forgetting half a dozen or so as well. Claridge was good too although I barely remember him and never saw him play in person.