HSReplays is currently tracking thirteen decks in the green. Warrior and Priest are shut out, with nothing particularly viable on ladder. The other classes don't have a great deal to choose from, apart from Paladin - the class has the top three decks on ladder.
FWIW - the devs have already tweeted that they will assess the meta-game tomorrow, with a balance patch to follow. They've explained that they will preferentially target last year's cards for nerfs, rather than the new stuff - Penflinger and Tickatus (perhaps others, as I've only read a couple tweets) have been singled out.