Lester, Woolridge, BJ, Oliver, Horner, Gessell. The top 4 are a head above the rest, Oliver was the last complete PG at Iowa. By complete I mean he didn't have any holes in his game, so he could drive, shoot or pass. There isn't much a difference between Horner or Gessell because each of them had serious flaws to their game.
Horner wasn't quick so he struggled against more athletic players, couldn't drive well and was vulnerable to the press. He used his height, passing ability and shooting range to offset these problems. Gessell was athletic but just couldn't shoot consistently and by the time his junior year rolled around his late game/shot clock phobia was set in stone. I actually think he would have shattered the all time assist record at Iowa if the first 3 teams he was on could shoot the 3.. I lost count of how many wide open shots were missed by those teams, it was clank city.
Gessell's late game/shot clock phobia brings up a pet peeve of mine, something that I have gotten into several arguments about with people. I believe his phobia was directly caused by Fran's late/last second offensive strategy, the 'wait til the last 12 seconds to begin running a offense for the last shot' strategy. Sure it is run virtually at all levels in basketball but its a low percentage play any way you slice it and at Iowa I have never seen it work. In fact, it usually leads to a last second TO with not even being able to get a shot off and the reason for that is it requires the person handling the ball to be a complete PG, able to handle the intense pressure while making high level judgements. They are in college, not the NBA and requiring that sort ability isn't realistic so instead reduce the pressure and run a normal offense until about the 12 second mark before executing a called play. It reduces the pressure, makes the defense not know what is coming(lets face it, a blind squirrel by now should know what is coming from that offense) and gives more options.