Quick notes on the top SFs. The ordering here is pretty fluid depending on what exactly you value in a prospect, I think, and that includes Barrett at the top.
RJ Barrett
Offense - Surprisingly polished game for an 18-year-old. There are questions about his scoring upside due to a lack of high-end athleticism and a streaky jumpshot, but there's no doubt that he's a threat to score from anywhere on the court, and that's impressive. Really good passer for his age and size; did a good job limiting turnovers considering his enormous usage. Tends too much towards chucking at times, but has the skills to be a point forward if coaches push him in that direction.
Defense - Just barely adequate at the college level; he'll have to make big strides on this end to hang in the NBA. Shockingly few steals for a wing, and many of them he only got thanks to the pressure generated by his more active teammates. Will add some value as a rebounder, and has enough size that it shouldn't generally be hard to hide him on defense.
Jarrett Culver
Offense - Had the profile of a blossoming superstar wing around midseason, but serious late season struggles cast doubt on how much potential he really has. Dribble/pass/shoot skills are there, but more raw than you'd like to see in a 20-year-old lottery prospect. Probably better off as a secondary rather than primary creator at the next level, but needs to improve his jumpshot to really shine in an off-ball role.
Defense - One of the better defensive wing prospects in the draft; good motor even when he was expending a lot of energy on the other end of the court. Projects to be fairly versatile with the toughness to handle big wings and the quickness to stay in front of most guards. Active rebounder, capable shot blocker in 1-on-1 situations and occasionally as a help defender. Good instincts playing passing lanes and pressuring ballhandlers without over gambling.
Talen Horton-Tucker
Offense - A full year young for his class beginning the season at just 17 years old, he wasted no time asserting himself offensively, always looking to make something happen when he touched the ball. Bowling-ball frame combined with willingness to pull up for deep 3's makes him difficult to guard, though he's not yet skilled enough to consistently cash in on the openings he creates. Also an above-average passer for his position who probably has some point forward potential.
Defense - Intriguing frame at 6'4" with an enormous 7'1"+ wingspan, and it's not crazy to think he could grow a little considering his age. Solid rebound/steal/block numbers for a wing, though too often he was a loose canon that disrupted his team's defensive scheme. Needs to get in better shape to really max out the defensive versatility his frame promises. Needs a coach who can rein him in a little, improve his fundamentals, and channel his naturally high motor more productively.
De'Andre Hunter
Offense - High-IQ roleplayer at the college level, though with less ballhandling and finesse than you'd hope for in an older wing prospect. Will find a way to make himself useful with his accurate jumper and his toughness on the glass, but underdeveloped handle and just-ok first step makes it hard for him to create against a set defense. His midrange jumper was a handy fallback option for Virginia at the college level, but NBA defenses will be happy to give him that shot.
Defense - Perhaps the very best 1-on-1 defender at the college level, he should be immediately useful in a defensive stopper role in the NBA. Really good at using his length to contest without fouling, and rarely gets beat off the dribble thanks to his quick feet. Very fundamentally sound in that he'll always maintain his position and never get baited into swiping for a steal. Though he certainly errs of the side of being too conservative at times, his approach pays off more often than not in the long run.