Sorry to quote myself, just adding my thoughts on the two bigs:
Wiseman: this doesn't mean what it used to, but he is one of the top center prospects over the last 10 years, in line with Embiid and Towns. Elite length and athleticism. High School film shows an ability to shot from the outside. With so little college experience to review, you almost have to look at him as if he is coming straight out of high school, so there is certainly risk there, is he closer to KG or Darius Miles? Talent wise, I have him on an elite level, but with so little high level data, he isn't a no-brainer. Biggest questions for me, is he a hard-worker? Any attitude issues? If we land at #1, he is my pick due to the freakish talent and length, but I'm kinda hoping that he is some other teams' risk to take.
Okongwu: I'm a huge fan...strong, high level athlete, soft touch around the rim and solid length. USC did his draft stock no favors by using him exclusively as a low post center (although he did excel at it on the college level), you have to go back to high school film to see that he can hit a 18 foot jumper. Not much evidence of it, but he looks to me to be able to switch and guard the perimeter. He is my pick if we are anywhere except #1.