A tank which focus on firearms - interesting. I was originally thinking the group was backline heavy, but with a gun tank and melee rogue - that leaves the crazy goblin in the back.
From the interest thread it looked like we might get a fighter.
I was contemplating a bard, possibly valor - could join as a back line ranged. Would be my first bard character ever, so probably suck at it - but he'd look good doing it. I don't know, I've avoided it for 45 years - maybe this time.