Not exactly true, there are bulkhead bassinet seats in old First on both the B744 and B777.
On the B744 they are 1A and 1K, which would be suitable for a couple with a baby.
On the B777 they are 1A or 1K, which would mean that one of the couple, would have to sit across the aisle.
On aircraft with new First the bassinet seats are not at the bulkhead, they are at 5F on the B744 and 4F on the B777.
I would stay in CW and take the middle two seats at the back of the cabin; these seats are at a bulkhead and as suggested great for creating a play area for a toddler.