Creighton has been very successful under McDermott especially in the NCAAs but overall record isn't that superior to Iowa when you consider the easier conference.
Marquette? Not really. Great this year but in Wojo's years mainly missed the tourney or a bubble team. One year as a 5 seed. We'll see with Shaka there.
Butler had good years under Stevens and Holtmann but have been not good since.
Xavier missed 4 tourneys in a row until this year.
So I don't think those programs have been consistently more successful than Iowa.
Having said that, I absolutely do believe there is a better coach than Fran that would come to Iowa. Do I think Gary Barta will find and hire that guy? No, I don't.
Iowa has hired 3 coaches since Davis' contract wasn't renewed. One below average, one awful, and one above average (Similar to Davis.)
Their track record of getting to the next level sucks and you think you're frustrated with Fran...do you remember the frustration of watching Alford and Lickliter ball?