Hmm...
I love the RAmarl, for the obvious reasons (good techs, good ATA, well balanced overall) and for the super pimp look of her side-arm shooting with a handgun.
I also love the FOnewearl; IMO, she makes the best support class for a party, bar none. The insane MST she can get (and the equally insane TP that comes with it) lets her equip a Glide Divine (or whatever your support weapon of choice is) earlier than most Forces, and learn techs a bit sooner. Being a Newman means the really early levels can be a little easier for solo players, too, as you can sit her somewhere safe, walk away to use the restroom and grab a snack, then come back to her TP being full rather than use up your 'fluids.
My true favorite, though, is the RAcast. This guy is MAD beastly. Highest ATP of the Rangers, highest HP potential of ANY character class, solid ATA, and since he's a droid he gets to see traps and have that nifty 30% bonus in Ultimate to the activation rate of ESP-related specials (confuse and paralysis being the important ones). That's especially handy, since it means you can make a Spread Needle kick butt even without Hit %. Being a male and having massive ATA also lets him equip one of my favorite guns of all time, the Master Raven. Combo or not, this thing will out-damage a set of Charge Vulcans until your ATP with the CV equipped is over 1000. Throw a Heavenly/Battle or V101 on him and the Master Raven will let you keep most any enemy staggered forever. Plus, he gets Traps. Not only gets them, but gets a better growth rate for them than a RAcaseal does.
Plus, the *CLOMP!* *CLOMP!* *CLOMP!* of his big metal feet stomping around (and leaving foot prints in the sand, or after running through water) are cool, too.