Way back in the Before Times, the first batch of fleet-scale DropShips (Leopard, Union, Overlord, Clan equivalents) were a bit larger than the currently available sculpts. Are the older ships still available for purchase, or are they gone forever?
I would prefer that a grounded Overlord stand at least slightly taller than a Hunchback.
My records only show one sculpt of the Carrier, 20-180. I think that first wave of DropShips was only the common 'Mech carriers for IS and Clan.
The first fleet-scale sculpt of the overlord isn't that big. You'll need to use a plastic egg for that.
A Battleforce Hunchback.
You'll need to use a plastic egg for that.