Well it looks like you're on the right track. I think the only thing that would make this "less cartoony" is just the head size. Wolverine looks good, but the guy in the middle...I'm curious as to what it'd look like if his head was like 15% smaller.
I'm taking a month off from DHX...needed to take some time off since it's been so long w/out a break for me. I go back in a few weeks...but I'm back in Ontario visiting family now.