My inclination is to play a ranger /monk because of the flexibility of the character and survivability during PvE (especially solo/or w/henchies)...Long distance attacks keep the enemy off of you, especially if you pick the right place to attack (go to higher ground).
Toward the end of the BWE I had a bow that dealt 13-23 peircing damage, 10% bonus against undead, customized for and extra 20% damage, added something like+6 attack when target was under an enchantment and was modified with a bow grip that added 40points to max health as long as it was equipped (also had armor that added +1 to marksmanship and a total of +13 to energy). At level 17 I was cruising through the wilds with henchies and doing pretty well...I died on a regular basis, but more often than not, I was the last one standing and would res the rest of the party. With marksmanship skills like ignite/kindle or apply poison to arrows with hunters/punishing or dual shot...I often inflicted up to 75-85 points of damage in a single shot...knocked a few undead casters down with bane signet early on. So...poo-poo to those who think a ranger can't lay down any damage!
While I had options to put points into the monk attributes, I focused on the ranger skills, primarily in marksmanship for dealing damage (11 marksmanship, 6 expertise, 5 wilderness survival, 4 healing prayers...something like that, give or take a point)...when the fights got rough, I'd run in and cast "healing spring" (+39 health for I think 8 seconds...and it's a
Ranger skill)...res a dead player and run back to the fringe and start laying down support fire...usually targeting the enemy casters/healers...The tanks would bash away indefinatly at an enemy, making little or no headway because they weren't paying attention to the Maguuma Protector hiding in the bushes or just around the corner...enter the ranger, who from a distance can see the whole field of battle...take out their healers with a few well placed shots and soon the fighters are chopping them down in quick succession...
Ranger are highly underrated by the typical hack & slash player who thinks might over mind is the only way to play...tactics and strategy keep you alive in GW more often than sheer force.
Ultimatley, your choice in character comes down to this (said before, saying again): what do you want your role to be? Damage dealer? (ranger is not the best primary for this, but holds its own) Disrupter/anti-healer/caster?(pretty good/excellent with the right skill set)...think about how you want to play before deciding on the character build (I prefer a support role for tanks and healers)...PvP or GvG or PvE...Rangers, I've found, can work well in all situations, given the right team (all classes can as GW=balance), but for me, wandering the wilds and farming in PvE...I prefer the ranger...monk secondary for support healing when things get sticky...besides, while the tanks are fighting, who's gonna watch after the monk...someone should, it might as well be me