Of course you can. A Leviathan. The title of the post sort of gave it away with that invented adjective. So, I caved in and got a Leviathan from Forge World for my Alpha Legion forces. I really love the sculpt of this beast, even if I'm not precisely sold on any particular weapon load out for it.
To start with, I knew that I wanted to base it on something a little bit less run of the mill. Hence, the legs of this Leviathan are located on the tips of a plane wing that I had lying around as spare thanks to the storm eagle build. One foot is raised and the second one is placed on the ground of the base. I have pinned the raised foot in to place to ensure that it doesn't slip. My goal here is to build upward from the waist and have the dreadnought looking down the barrel of his (left hand) weapon, whilst the right hand is poised, ready as he advances.
More on this build in future posts.