Starting at the top:
I think everyone is agreed that the Ducks and Bucks are the top-2. Personally, I'm surprised that Oregon is a near-unanimous pick for #1.
My view is that a 1 point win by a home team isn't conclusive. Here are Oregon's and tOSU's columns from my performance chart:

As mentioned above, I simply don't see Oregon's 1 point home win as conclusive.
Next, Ohio State has a one-score road win at Penn State and a big win at home over IU. Oregon didn't play them.
The 29/28 point home wins over IL/IA seem pretty comparable to me.
Oregon's worst performance is probably their 3 point win over UWisc and tOSU's is their 4 point win over UNL.
Ohio State looked better against MSU (31 on the road vs 21 at home).
Ohio State's 24 point road win over NU seems reasonably comparable to Oregon's 21 point road and home wins over UCLA and Maryland.
The Bucks and Ducks looked about equal against Purdue. Ohio State won by 10 more points but at home so this is about the same as winning by 10 less on the road. Furthermore, I don't think it is wise to read too much into the difference anyway because both teams won easily and either probably could have won by a little more if they had wanted to bad enough.
That seems awfully close to a push to me. I lean tOSU simply because I believe that HFA is real and if it is then a team that loses on the road by 1 would win on a neutral field.
Next we get to IU and PSU where it seems most of the board has IU ahead. I disagree. Here are IU's and PSU's columns:

They both lost to Ohio State but PSU looked like a relatively even match-up, IU didn't.
The MN/M results are probably reasonably comparable but PSU has a 14 point win over IL that IU can't match due to their insanely weak schedule.
PSU looked better against Washington.
PSU played USC and UWisc on the road and IU played UNL at home and MSU on the road. PSU's opponents were tougher and IU had bigger margins.
IU looked better against UCLA.
This is fairly close too. I'd lean PSU for three reasons:
- I think the tOSU comparison is more important than the others and PSU wins that one easily.
- I expect PSU to beat UMD by a lot more than 14 points.
- I do NOT expect IU to beat PU by 39.
As I see it, #5-#9 has to be the rest of the .500+ teams so here are their columns:

Against Oregon and Ohio State they all looked bad (21-29 point losses).
Minnesota looked best against PSU.
Michigan looked best against Indiana.
Minnesota looked best against Illinois.
Iowa comes off looking great in the comparisons against themselves.
Iowa looked best against Minnesota.
Illinois looked best against Michigan.
Iowa looked best against Washington.
The three that played USC each barely beat them. Maybe USC is just unlucky?
Iowa looked great against Wisconsin.
Illinois looked best against Rutgers.
Illinois looked best against Michigan State.
After adjusting for HFA, they all looked about the same against UCLA.
Michigan looked best against Northwestern.
Minnesota looked best against Maryland.
I typed all that out thinking that a clear #5 would emerge but that didn't happen. It is just a muddled mess. Looking above I have:
- 4 "bests" for Iowa (IA, MN, the UW's)
- 3 "bests" for Illinois (M, RU, MSU)
- 3 "bests" for Minnesota (PSU, IL, UMD)
- 2 "bests" for Michigan (IU, NU)
I guess that eliminates Washington because they didn't look best against any opponent. I guess Iowa is #5. Then I'd go IL, M, MN but that is highly debatable.