Since Bob Kennedy I'd say a handful of people have had better careers. Obviously Rupp, Fisher, Lagat as they've run fast and won medals and won US titles. Chelimo I'd say also did better because he's got the olympic silver medal. I'm keeping middle distance out of it, but Hocker now has a world title at Kennedy's main distance and has run sub 13 so he's had a better few years. Argument for Solinsky. Kennedy was running in the US dark ages so he looked exceptionally good, kind of like how Rupp was looking around 2012. If Rupp were at his 2012 level right now he wouldn't be so dominant with the likes of Fisher and Hocker and others not far behind. Kennedy and Rupp were the clear dominant US runner of their eras so they seemed better because of it.