OP, why do you have OSU at #4? I have nothing but good things to say about OSU basketball fans, have had some great conversations with them over drinks at the Big 12 tournament on multiple occasions, even when their team is good they are still a pretty humble and respectful fanbase I think. I'd put them in the bottom 3 of the list.
KU and WVU are definately the 2 worst and you can probably put us and KSU at 3 or 4 depending on whose fanbase is giving the perspective. I doubt you would find a fanbase in the conference that doesn't view KU as the most obnoxious and WVU right behind them other than KU themselves.