I posted this in the NBA Draft forum, some names might be missing, but I think the most importants one are all there, just in case you want to research some ones you might don't know.
A Big Board of 100 prospects is possible in this class, and that means is a deep one.
Less star power but seems to be a deep class also.
Some international talent at the top with Hezonja, Porzingis, probably in the lottery, and Diop, Garcia, Milutinov, Jaiteh, Sipahi, Hernangomez, Diagne, Larsen, Vrabac, Buza, Vezenkov, Todorovic, Dimsa, Ponitka, Pasecniks, Osman, Birsen, Diez, Zhelin,... around too.
Jahlil seems to be the clearcut nº1 at this point, with Mudiay as the main competition, I don't believe there is major superstar talent, but there are pretty good players, well rounded ones, high IQ guys.
Guys that I like, and I believe they could declare/be there,
Okafor
Mudiay
Hezonja
Alexander
Towns
SJohnson
Porzingis
Brimah
LeVert
BJohnson
DWright
Jordan
Hollis-Jefferson
Portis
Mickey
Hamilton
Paige
TJones
Winslow
Dekker
Ridley
Ashley
Kaminsky
Sulaimon
Bird
Ferrell
Nichols
Shepard
Layman
Karnowski
Williams-Goss
Baker
Finney-Smith
Purvis
Mickelson
Dawson
Frazier
Powell
Hield
Haws
Petteway
Goodwin
Long
Ellis
Hunter
Thompson
Niang
Polee
AWilliams
Valentine
Staten
Kennedy
Qualls
Moore
Cook
I don't like that much... Myles Turner, Dakari Johnson, Cauley-Stein, Poythress, Hammons, Jerian Grant, Harrell, Chris Walker, Kelly Oubre, Wayne Selden, Tarczweski, Tyrone Wallace, Boatright, Hanlan, Joshua Smith, D'Vauntes Smith-Rivera, D'Angelo Harrison, the Harrisons, I think they could all be there/declare though.
I think Jabari Bird, Caris LeVert, and Isaac Hamilton are clear choices to a possible break out, Derrick Walton Jr., Troy Williams, Dorian Finney-Smith, Nigel Williams-Goss, Rodney Purvis, Terry Rozier, Malcolm Brogdon, Ron Baker, George Niang, Norman Powell, Rasheed Sulaimon, Markus Kennedy, Tyler Roberson, Rysheed Jordan, Johnathan Williams III, Jarell Martin, Robert Hubbs III, Przemek Karnowski, Ryan Boatright, Jake Layman, Winston Shepard, Sam Thompson, Amida Brimah, Austin Nichols, Nick King, are others, some of them probably will wait for another year, or even too.
And it's a weak class in the wings, at least top flying prospects, some teams that will be bad, Orlando, Philadelphia, Detroit, Minnesota, Utah,...and mostly need wings, are going to have a hard time in the top5-10 to find one worth of ir, outside of Hezonja, Johnson and Oubre, I don't see wings that could be top10 picks, and I have my doubts with those 3 too.
Could be a very deep class, we will see.