Given Big Convoy’s bulk, Hasbro could well go back to the “smaller leader with extra junk” angle we saw with Coronation Starscream or many of the WfC Leaders. As the “One Robot Army”, I don’t think it’d be a stretch to see Hasbro throw in a bunch of weapons.
Magnus Primal? Maximus Prime/Primal? Loxodonus Prime? Mammus Prime/Primal?
If they gave him a ton of extra weapons, they could do a portmanteau of 'Mammoth' and 'Armory'... Mammory Maximus!