I think Smart would go #3 or #4. His slashing game looked way better at the time than it does now, and I don't think you take a guy like Murray or Hield over a two-way PG who is elite on defense. Imo Dunn is not quite the propsect Smart was because he's merely a very good, rather than an elite, defender.
As to Okafor, I never liked him and would've probably taken him around 7th in 2015 (Russell, Winslow, Hezonja, Porzingis, Johnson). This year I'd probably take him 4th, and I think it's laughable to take him over Ingram.