The wonderful silliness of interwar tank design matches the similarly colourful and varied history of interwar aircraft.
It was a time for designs to be worked on within an atmosphere of competition, but also with a good deal of freedom. Many suspected war was coming, so the money (and pressure) was there to fund designs in plenty, but as war was not actually imminent yet, there was room for wild experiments and flights of fancy.
There was such a varied history of design... some were obvious duds, some were great for their brief heyday only to end up as design dead-ends, while others started with teething troubles but proved amazing and versatile platforms over the long term. Parts were stolen and copied from design to design and between nations in a wild form of mix-and-match to build things which suited each nation's individual rearmament goals.
It's such a fantastic era for design. The art of the age matches that spirit too, with different schools of wildly different thought exploding all over the place.
As for more concrete suggestions about tanks specifically, well, the Soviet T-28 and T-29 have been suggested. Others which come to mind are the freakishly vertical open-topped American M2 Medium or the sporty-looking French D1 (or even its predecessor, the Renault NC1 with its lovely exposed and massively sprung interwar running gear),
The D1 already exists as a mediocre-quality Warlord model. Not sure about the others.