TBH, this isn't that interesting.
A few years ago when phans loved Saric, I responded that I think he was a good player, but his talent was limited. My response to this question was that I would have taken Jokic (which is obviously correct in hindsight). Did the Sixers mess up that pick? Most phans would say no, but your question would say they were wrong.
You have Tatum listed and the Sixers traded up to pass on him.
In order to perform this exercise, you have to assume it's from the day of the draft and not after the fact.
I thought Ben was the obvious #1 choice and wasn't concerned about his shot as that can be fixed. I still agree with half of that statement. Unfortunately, it doesn't seem his shot can be fixed.
Ben is obviously a good player, but has one major limitation. If people want to remove his draft ranking that's fine, but you then have to include the percentage of the cap that he currently (and in the future occupies).
And I would be totally fine with his current game as long as he'd learn how to shoot free throws. Well maybe I wish he'd be more aggressive.
EDIT: to expand on that, you have players listed in drafts that Ben wasn't in, so the team could have obviously traded the 2016 #1 pick at the time of the draft for much more than what you listed.
EDIT #2: In other words.... Ben Simmons on draft day is probably worth more than he is today. You could play this game all day. The Spurs wanted Simmons in a deal for Kawhi. In hindsight, would you do that deal?