Dreadnought
No, not the boat.
A player type that is a dreadnought from Warhammer 40k. Left click would be the minigun, right click the arm. The arm would sorta be a combo of the gravity gun and the tranquilizer. FLAMETHROWER. The cannon on top you could keybind. The projectiles for the cannon would be gravity rockets. The minigun wouldn't be Kaje's, but it would have a charge up noise, then fire accurate, raycast projectiles that cause 12.5 damage.
Bolters
Someone could port the old ones, or someone could make a new bolter pistol and regular bolter.
Space Marine
A space marine from Warhammer 40k. Might be high in poly, so some decals would be nice I guess. :-/
Pictures for reference: