Alex Dragicevich went to Glenbrook South. Both schools are in the Central Suburban League. I expect Collins to be able to be in on the best CSL prospects, but it doesn't produce a lot of D1 stars. There is a hot prospect every now and then, but it isn't an every year thing. GBN had Collins, Jon Scheyer, and Cooley over a period of 15 years. GBS had Dragicevich. Deerfield sent Duje Dukan to Wisconsin on the heels of the Glenbrook guys going to Notre Dame, but he only got into 21 games for a few minutes per his first two years before redshirting last season.
The best prospect to come out of that conference recently is Jewell Loyd.