Hell? An average Vong would get WTFpwned by the average CW-era Jedi Knight. A slayer would be able to take an average Jedi fairly easily, but your ordinary Vong warrior? Please.
Besides, the Jedi aren't fighting Vong immune to the Force; they're fighting another Jedi.
Ganner gets owned. He'd probably take some Jedi with him - that trick when he spun around the chunk of metal to deflect the beast's acid was neat - but he's going down hard.
Ganner killed the initial dozens, hundreds of Vong because they were too dedicated to their traditions; single, honorary combat as opposed to WTFmobbing and pwning people. When they brightened up a bit, he still managed to slaughter them, yeah. But he won't be able to crush Jedi with the Force. If he hurls something at them, they'll catch it, and toss it back. I maintain my opinion - Ganner would take out several Jedi, but he'd go down to their numbers and skill.