Gunther for me. I wasn't expecting all that much, but he's SO strong. His Strength and Defense are off the charts, and he gets the extra movement range, AND he has a power that reverses all debuffs into buffs. So much utility, and he's strong enough to survive against most triangle-disadvantages for 1 turn, which is great when I need a chokepoint blocked off. And he's my only a *4, while fighting alongside *5's as an equal!