I don't know of any FAR based freight operators, which doesn't mean there aren't any. I only ever stop through there for now so I'm not that up to speed on what's going on up on the north ramp.
Back in the day I thought we shared hangar space there with a FedEx caravan, probably Corporate Air.
Don't think they have anything out of there anymore.
Martex flies into there out of FSD, I think. Alpine used to but I believe Martex took over their runs.
They're FAR based, or at least one of the planes are, wouldn't touch that company with a ten foot pole though.
The Landmark guys out of FSD might still go up there as well.
We have a 402 out of MSP going through there, but again it's only there for a couple of hours.
Corporate Air flies FedEx feeder runs out of GFK, but that's 80 miles north. Be a good gig though. I hear Martex coming out of GFK every evening as well bound for FSD.
This is your best bet, IDK if they're hiring, but another JC member on here flies for them, and he seems to like it.
Bemidji flies into and out of Detroit Lakes, which isn't that far away. Dunno if that run is based there or out of MSP though. They also hit Fergus Falls, again, not that far away.
Probably Detroit Lakes based. They also have a Devil's Lake 99 route for the time being, who knows with the UPS shuffle though. Almost (almost) all UPS flying is outstation based.
Corporate Air is probably the best bet up that way, at least for freight. Fargo Jet Center still operates a King Air or two and a Seneca on pax charters and Butler Machinery flies the snot out of a couple of PC-12s but I'm guessing Butler's seats won't come open anytime soon.
Haven't heard great things about Butler, but there are two King Air's for Sanford Hospitals up there. Pretty tough to get on with though. Seems like every Dakota area pilot has an App in when those open up. Don't really know what the Pay/QoL is at the Jet center, but they all seem like a decent company to work for.
Alpine Just hired a GFK driver for the 1900 so I'm assuming that won't open up for a while.
As said before Corporate Air is probably your best bet.
Good luck!