You've got to put Jeffco (Jefferson County Community College-near St Louis) in the mix.
Sam Carel has done a great job there and many of his guys have moved on to do well at D1's.
Mark Buehrle, Chicago (Whitesox) is their most famous alum.
Also, John Logan College near Carbondale, IL.
Impressive list of guys moving on to D1's.
Heartland-Normal, IL(previously mentioned)is JUCO DII, but has done a great job of attracting some very good players! I think this might only be their 4th season of existence? 2 of our former Summer kids are there and they love it!
Also, may want to consider Maple Woods-Kansas City.
They had a shortstop a few years back who was pretty good! He was drafted by St Louis in the 13th round and signed for $60,000.
I heard he might be getting a bit more than that in his next contract?