Best classe for achievement hunting

After a long break i want to come back
Fresh char, one goal: 10k achievement

I dont want to make it too painfull so i will go for thé most Op class

In m'y opinion classes will give advantage in the two following kind of achievement :

Dungeon farming, PvP ( Arena ans battle master ) and pve rare achievement (ulduar, ICC Glory..)


Im thinking pala tank/heal or dk must be the best classes since

Tank its easy to find spot in raid. OP to solo dungein. OP in Arena si even if I suck in PvP it ll be easier to reachz 2k rate with a pala than a rogue


What do you think? IS there other classesz rhat I should consider ? ( Drood tank ? Démo?...)

Personally DK is my choice for my achievement hunting character, but Retri Paladin is also really good on soloing content, Choose whatever class you like playing the most, a lot of classes can do the job.

I think Paladin. It's bit more versatile than DK. Druid could be fun.
As a Paladin, you have three roles to raid with.
You have good AoE (comes handy in dungeon farming and soloing them) and single target DPS is still good.
You'll have wide variety of buffs to adjust to situation (auras, blessings).
You'll also have big pile of CD's to utilize whether it's for bursting, defensive or to sustain yourself.