Kyrie and Wall went 1.
And I think you're confusing Markelle being smooth, with lack of athleticism, you can probably count on 1 hand the 6'4" guys in the league that can dunk from around the foul line.
Kyrie and Wall both came in epically weak drafts with almost no other competition making them the default first overall pick. Just look at who the following picks were those years. In 2010, Evan Turner was the #2 pick, Derrick Favors was #3, and Wesley Johnson was #4. And in 2011, Derrick Williams was #2, Enes Kanter was #3, and Tristan Thompson was #4. Lonzo Ball is a way better prospect than any of those dudes. If Fultz had the competition Kyrie and Wall had those years, I would be behind him being the #1 overall pick as well.
Plus I would consider Wall close to D-Rose and Russ in terms of freakish athleticism. I was high on him before his draft and he's only now living up to expectations. And although Kyrie has had a decent career so far, he's honestly not the type that could lead a team anywhere by himself. He's basically a undersized SG without great athleticism playing PG. He's got a sublime handle and elite one on one scoring skills. Those skills paired with LeBron James have allowed him the perfect role as elite closer on a championship team. However, his poor defense and lack of elite play-making skills make him a sub-par candidate to be the first option on a championship team. And that is usually the standard I use when trying to determine whether a player is worthy of going #1 overall in a draft.
And on that youtube vid, there is a reason they started out with the slo-mo of that dunk. Cause in full speed shyt was unimpressive. I'll give him kudos for jumping from near the free throw line. But then again Brent Barry did the same shyt when he won a dunk contest and he never was a great athlete in the NBA.
Markelle Fultz is a below average athlete. He's not explosive. Either off the dribble or in the paint attacking the rim. Like I said earlier, he's a CJ McCollum/Dame Lillard level NBA player (at best). He's also got full-on bust potential cause he don't look like a guy who loves the game. And as I said he doesn't have a high ceiling. So even if he's better than a bunch of guys right now, he won't be better than them in 3-4 years like Tyreke Evans.