I believe character is the most important of all when you going into a new MMORPG
Here is a run down some powerful class thats not gimped.
Theurgist<~~ Most Uber class of all, and can do very well in solo, group and RvR and also the best caster got little mini pets that can spam at enemy but the pets dies in 30sec. and transfer half of their aggro to the caster.
Thane- 2nd most uber class got dd got plate so tankable and great weapon damage
Skald- my favorite, its a bard in fighter class but has less variety in spells but very versatile class
I am just going to run down the list now, you can get more info from
www.camelotvault.com go to the forum and take a look
Healer
Hunter, Ranger, Scout<~~ Most powerful class for RvR due to their ability of heavy damage on bow and snipping
Berserker- most melee damage amount all classes
runemaster
Armsman
Cleric-powerful DD
Minstrel
Wiz- after the test patch then its good (patch to live server coming on Monday)
Bard
Champion
Druid
Eldrich- after test patch then its good
Enchanter- after test patch then its good
Hero
The rest of the class are consider by most people gimped.
shadowblade, shaman, spiritmaster, Warrior, Cabalist, Friar(wow! so gimped not even funny), infiltrator, mercenery, paladin, sorcerer, blademaster, Mentalist, Nightshade, Warden.
Enjoy!
GenYScorpio