Well, I've got a few to add as well.
Eagleheart - As has been said before on this thread, this guy ROCKS! Aside from single-handedly helping me get the Carby Ruby very fast, helping my friends and I get rank 3, being always ready to start up a decent conversation, and helping me on countless other occasions, Eagle, on the first day we took a few minutes to chill and chat a bit, discovered that i was a very poor WHM18. So, being Eagleheart, he gives me 10k and says: "Here that should get you some gear, etc." Granted, 10k can be spent rather quickly, to a weak li'l WHM it can make a world of difference.
Crogan - Or as I call him, the "God of Death." This badass BLM is part of my LS (Children of Enigma) and is always ready to help you if you need it.
Chade - Also part of my LS. Aside from being ready to help you on a quest or mission at a moments notice, this guy is a walking, talking, FFXI strategy guide. You can ask him, "Hey Chade, what is X item for?" And he'll answer you in a matter of moments.
Ajora - Called Queen by some, because she is the leader of our LS, this Elvaan is one of the best people you could ask to have watching your back when fighting the monsters of Vana'diel.
A few more...
Meesum - Just a fun taru, with his wee little boots!
Ryley - In the middle of the friggin night in the dunes, this RDM gave me a PL because she was bored.
Gyga - The most lovable Galka you will ever meet, too bad I havent seen him in months!!
Well thats it for now, but I'm sure I'll be able to come up with more "Cool Kujatans" soon!