Shrine knight is really good, especially with a Caith Sith SS and a third Elaice. Lapierre is a solid file that can hold it's own in Folrart. I've heard good things about Carbuncle, but I've never been able to reproduce them myself (1900 RP buncle file, really?)
So in order of preference: SK, Lapierre, Buncle
When the end comes, and enemies are rushing in from all sides, I will be at your right hand.