Depends on what the setting is. If it's a place filled with debris and rubble, Starkiller could use that to his TK advantage. ANd I really don't know what effect Force-lightning has on the Vong, or whether they can block/absorb/deflect it with their armor and weapons.
If they can, and there's no suitable detritus, then I'd give this to Shimrra. I've heard he gave NJO Luke hell, and that's with Luke mind-melded to... Jacen? Jaina?
__________________ Recently Produced and Distributed Young but High-Ranking Political Figure of Royal Ancestry within the Modern American Town Affectionately Referred To as Bel-Air.
Shimrra had so many advantages against Luke and still lost relatively fast. If it were an equal environment then it would be like Luke vs any YV just a little over sized and would have been over very quickly and easily.
__________________ "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