Out of the free 5 whos the overall best char

storm if they unnerfed her at all

I was leaning towards storm, scarlet witch, or thing

You will also get another starter hero after you beat Green Goblin. So 1 in 2 chance you could wind up with two of the three you wanted to play anyway. If you want a tankier melee go Thing, Storm/Scarlet are AoE skill-based, Hawkeye is like a Demon Hunter and Daredevil got a lot of buffs in the latest patch, but he was probably the most average of the five.