are you looking for a template to PvM and PvP with at the same time? hardly doable because you will have to make sacrifices that will either not allow you to do highend PvM stuff effectively or cripple your PvP ability.
for the new PvM content of the last 2 years tamers are probably the way to go, especially with the taming revamp. sampires and to a certain degree full bards are also still strong, especially when combined. no matter what you choose here you need to tailor everything to whatever monster you want to kill - for the tamer you will need certain pets with certain templates, the sampire also needs a certain template and special weapons depending on what he is supposed to kill.
PvP really depends on whether you prefer dexxer or caster types (and also on your ping to Siege). lot's of good builds out there for both. too much to list.
I know, all of this is really vague, but so is your question =)
the more specific you can be, the more specific the answers will be
welcome back!