Thrawn was a military genius and I believe he would been able to stop the Vong cold. Possibly, even drive them [the Vong] back to their own galaxy. What are your opinions?
I didn't think Caedus was a great tactical military leader. Didn't he make several critical bad decisions?
__________________ "You must begin by gaining power over yourself; then another; then a group, an order, a world, a species, a group of species... finally, the galaxy itself."
- Darth Plagueis
"She may be small but she packs a punch and when shes in this mood...she goes for my danglers" - Oghren, Dragon Age
But, yeah, Thrawn's tactical skills are virtually without peer (save for ex-Grand Admiral Zaarin). In truth, he would receive some difficulties in combating the likes of Tsavong Lah or Nas Choka, but not enough to threaten him completely.
tacticaly thrawn has few if any equals. as far as driving them out of the galaxy he could but i think he would see them as too great a threat to let escape and instead wipe them all out. it wouldnt be easy and it would take take some time but in the end the vong wouldn't stand much of a chance