Vinnie is his consigliere who is obviously wiser and should really be in charge.
And Hartnell, G, V, Downie, Coburn and Couts look like his runners/drug underworld associates.
Emery looks like a competing drug overlord.
Rinaldo looks like Streits little brother who is destined to take over the empire but is killed early on in the film.
Raffl and Grossmann look like the foreign guys who screw them in a drug deal. Raffl the smooth talking one and Grossmann the muscle. Mez stands behind them and does nothing apart from look european.
Hall, Mason and Simmer look like the FBI agents after them. Hall the bad cop, Mason good cop and Simmer the undercover guy. Hal Gill is the wizened old FBI guy who is past it but comes out of retirement to help.
The Schenn brothers look like spunky kids who get caught up in it. VandeVelde looks like their friend who got killed after getting into debt causing them to be caught up in it. Gus looks like their friend who bails them out.
Kimmo is the guy who is mentioned in ushered tones at almost every scene in the film (and the guy who sent Raffl, Grossmann and Mez)... but you don't see him until the last 10 minutes, where he cleverly screws them all out of all the money without leaving a trace. But leaving Couturier, G and Voracek alive and with a life lesson that will help them in future escapades.