I wouldn't put Brown on that list.
Brown could contribute at the NBA level right now. He's got an NBA body with NBA athleticism, he's a good rebounder, he's a quality defender, and his jumpshot is better then advertised.
He is pretty much just as NBA ready as Justice Winslow was, except that Brown has a significantly higher ceiling due to his athleticism.
Realistically Andrew Wiggins was far more raw/limited when he was drafted then Brown is, so I'm confident brown could produce from the star.
And even when he's "fully ready", what will he be? A reserve big who can't rebound? I've already ranted about him in another thread, but he's not first-round material, much less top half of the first round where everyone seemingly puts him.
He has the talent to be a VERY impressive two-way player one day.
His athleticism and defensive potential are on Deandre Jordan level, except Skal can shoot and has half decent moves in the paint. His rebounding is really about the only criticism, otherwise his potential is sky high.
I think Skal is one of the highest up/down players in the draft in that his floor is that of a guy who may struggle to make a roster, but his ceiling is that of a future perennial all-star.
I think his upside is FAR higher then Bender's, but his floor is significantly lower - he's a bigger risk.
When you have a guy with Skal's combination of size, athleticism, inside moves and outside jumpshot - you have a potential future star. Not sure if he'll ever realise that potential, but it's there in spades.