I think Jonathon Sumption goes into some depth in one of his HYW books- unfortunately it is still early HYW but it might be useful?
Unfortunately not, like everywhere else things moved on in the Netherlands and 14th Century Flanders was as different to late 15th Century Flanders as England and France were in the same periods. There's a fair amount of stuff out there on the 'Courtrai era' and of course a lot about Charles the Bold... which is also equally unhelpful, as his army was a short-lived aberration.
Actually though, in this case it would have been a mix of merchants, artisans and the lesser nobility involved in the revolt, at least in the main.
Indeed, the Ghent revolt would have seen a 'typical' Low Countries force of the time turned out by the city, with members from all levels of their society. The revolt was led by city hall and the guilds, not a spontaneous rising up of downtrodden mud-sifting folk.