Emirate Xaaron - he was in the UK Gen1 comic a fair bit for a non-toy character, and it was really weird to me that he never had any sort of toy, even a token toy that barely looks like him (like Jhiaxus has had several times now), or even by the Collector Club... who gives us really obscure characters that no one has ever heard of.

Since Xaaron was apparently a small combat tank a long time ago (but could be anything at any time, as characters change their alt-modes all the time)... I think the Japanese combiner Nosecone without the drill accessory would work as a UK Gen1 Xaaron, with a head that looks a little Megatrony.