Assuming the character is NOT force sensitive...
Ok, my top pick is shi-Cho knight FaD core, 4 more ranks of parry, improved parry, defensive training, multiple opponents, 2 durable, 2 second wind, a toughened, a grit, (natural blade master is ok if you want to be able to reroll two melee attacks per session, the other coming from natural brawler), and you only have to waste xp on one force talent to get to the dedication.
I think my second pick would be doctor (3 grit, 1 toughened, 2 resolve, pressure point, and an easy to reach dedication) for a traditional monk flavor.
And my third would be gadgeteer, in career cost, ranged light (as a backup) a pretty straight shot to dedication with an easiy to reach deadly accuracy along the way. Armor master and improved are nice.
Edit:
And if you want to go the "maximum parry" route, martial artist + shi cho knight + makashi duelist would be pretty close to un damageable (11 ranks of parry, or immunity to 13 points of melee damage for 2 strain)
Edited by EliasWindrider