The coach of Cercle Brugge is a 41 year old Austrian/Bosnian, took them from bottom of the league to narrowly missing out on Europe last season and is doing a good job by all accounts. Not Belgian I know but manages there and the owner of the club happens to be Sartori's FIL which is an interesting link.
Belgium is a strange one. The standard of the leagues aren't great but the coaching and the systems over there have always been very good.