In this draft, I think guys like Topic, Williams and Knecht will be solid pros, guys who are starters and significant contributors.
Devin Carter is a guy who will probably have an impact just given how hard he plays and how he plays with his heart on his sleeve, so to speak.
Zach Edey if he has the right players around him and is the hub of a system that's designed for him could have a big impact. The debate is whether his reactions are quick enough, and honestly it could go either way.
Buzelis should be a good ball mover and connective type player.
If there's a player who is slated to land in the later 1st round, but actually has some All Star potential, then imo that player is probably Kel'el Ware. He has the tools and probably enough feel to be a near star-level player. The word on the street, however, is that he doesn't work hard enough and doesn't really want it. So who knows.
Nikola Djurisic has a nice combination of size, shooting and ball skills, if his shooting is consistent. There could be something there.
To be a star in the NBA, a player has to cover a number of bases. I'm not seeing many prospects in this draft that check the boxes well enough to project as a star. I think Topic and Williams probably are the most likely to become stars, but it might be a 30% or maybe 40% chance of happening. Topic would do some things a bit similar to James Harden, and Cody Williams would need to develop along a path similar to Shai Gilgeous-Alexander or Brandon Ingram.