Madame Sybelle is an almost auto take with Molly. Call Belle is the main ability that you will use, and it can really help to reposition Molly. Often I'll take maniacal laugh on Molly just to get some activation control. Once you can out activate the opponent, Call Belle on Molly to reposition her close enough to the enemy that she can summon Punk Zombies right into the middle of them, then have the Punk Zombies slice and dice or flurry. It might take two rounds or so to set up properly, but boy is it worth it.
Alternatively, you can use Sybelle to get Molly out of trouble.
I also really like the Carrion Emissary. Shards can help to block fire and charge lanes. He hits quite hard, and is just great utility. I generally run him with the generic upgrade, Carrion Conflux.
I also like the Rogue Necromancy as Bengt recommended, nice ranged support, and the while it has enough heads is gravy.