I'm gonna put down Lando here. I mean, in retrospect it was obvious he was going to be good, but actually seeing him lay down his AOE for mass damage against 6 enemies ... *wipes tear from corner of eye*
Any other unexpected Hoth Heroes? I'm actually wondering how Pao is faring. He's another one with a big aoe, and I imagine pairing him with Leia, Han, Ezra, and GK would be a good way to ensuring it's always ready to go on his turn.