Not sure we get there this year. And that is the point. If we do not win any against the top 3, what would be considered quality wins? I can think of only 3 other teams that wins against might be considered quality at this point. Indiana, , IA and maybe MI? Who else? Not sure I see the BIG getting more than 5 in then dance this year unless NU makes it.The Big Ten has seven or eight teams in the tournament every year. And a couple in the NIT. So, the top ten teams are quality. Not all the same quality, but quality.
Let's say NU is in the top ten. That leaves nine Big Ten teams from which to get a quality win.
The three you mention as quality are all in the top ten of the national polls. That leaves six teams that aren't NU, MSU, Purdue or Maryland who will end the season ranked in the top 75 or so. Wins against any of those teams will be quality wins. Of course, the higher up the food chain the win comes, the better the quality.
NU only plays the three teams you mention a cumulative four games. So, there are 14 conference games plus tournament games remaining to get a handful of quality wins. Assuming they don't win one of the four against the top-ten nationally ranked Big Ten teams.
It's plausible if NU continues to get better as the season progresses. But they can't get blown out in conference and they have to avoid stringing together a series of losses.
Just saying we could have our first ever 20-21 win regular season (not including BTT) and not get there. The conference (other than the top) looks that weak. They will probably be back next year but for this year, looks weak.