i'll add another possible candidate...
chris jans, current bowling green coach, would be a home-run hire for k-state. in his first season at bgsu, he's led them to a 19-10 (11-7 MAC) record and has a chance to reach 20 wins if they win as expected on monday. bowling's kenpom rating is 86th, highest in more than a decade, after being mostly in the 150s to 240s the last 10 years. the turnaround has been far quicker than anybody could have expected.
jans spent eight years working as an assistant under marshall at wichita, and also had a previous stint at independence, so he's very familiar with kansas. he's been a head coach at five schools (one or two year stints at all), and is 175-51 overall (he's never won fewer than 20 games at any stop, and has 25-plus wins in four of seven seasons).
anyway, the guy is impressive. would be a good option for 2016-17.