Hearthpwn

Data from: https://hsreplay.net/cards/#sortBy=includedWinrate&showSparse=yes&set=ICECROWN

Data shown includes last 14 days, which includes data from pre-expansion. It is still early in the meta and this is only a first look, although still important since a lot of people are impatient to begin crafting legends.

In raw numbers, the top 6 standard are:

Malfurion the Pestilent

Thrall, Deathseer

Uther of the Ebon Blade

Shadowreaper Anduin

Bolvar, Fireblood

The Lich King

My interpretation: I see Uther of the Ebon Blade and Bolvar, Fireblood as higher risk because other paladin decks (Murlocs, etc.) may continue to have a higher winrate after expansion (right now, Murlocs are noticeably better, but this includes data from pre-expansion). I would put these as "wait and see" for now if you are not a heavy spender.

In Wild, the standout is Bloodreaver Gul'dan, who has very poor numbers in standard because of the weak pool of demons, but is doing very well in Wild.