Did any of the Red Lanterns do any dimension traveling? Because that would be an alternate method of removal. Other than just throwing them really far away.
I don't know a whole lot about the Red Lanterns except their blood was replaced with Lantern energy and they puke acid fire. Theoretically, if you absorbed that energy, or removed the ring, they'd die, but Juggernaut is magically sustained so that probably wouldn't work. Not fatally anyway. It's kind of like Juggernaut wrapped in another, flame throwing, Juggernaut. That said, I think Surfer could do it. Thor might be able to do it but Surfer seems like the safer bet.