I haven't pointed out Goliath in a bit, I modeled my leader with a power hammer cuz it is just cool. I have a renderizer model with a marine bolter magnetized to his back so I can start cool and add functionality depending on that all important first game.He's perfectly deadly with just his fists to start with if you want to go the shooting route.
e.g.
A leader with a bolter is:
- BS3+ S4 D2 AP-1 Rapid Fire 1 for shooting up to 24 inches with a +1 12 inch short range.
- WS3+ 3A (4 attacks on the charge) at S4.
Giving him a single chain axe doesn't make him much deadlier in close combat (for all intents and purposes S4 == S5, i.e. S5 isn't a breakpoint strength). Parry is almost never going to come up in a meaningful way. Rending is a nice bonus, but can't be relied on. Disarm is nice and all, but if something survives your attacks, then you done messed up. Close combat in this game heavily favors the attacker.
Get the back up weapon later.
@dialupsyndrom I take the heavy bolter in orlock, they are a bit cheaper to start and have an easier time getting ammo roll help. I'd shy away from the heavy bolter in Goliath don't "need" it.