I'm Trvth Jvstice, here and on GWG plus a few other tech/gaming sites. My favorite Characters in Guild Wars are My Necromancer and my Warrior. At the moment I've been using Moloch Vein's Assassin Promice MoP Nuker on my Nec and the standard D Slash imbagon build on my Warrior.
Of all the different characters to choose from in GW, the Necromancer is best at anything in the game except for Healing and one on one DPS. But, put a Necro in any group and by the end of the Mission/Quest, a good Nec will have to have been considered the MVP for that outing.