If you take the four Build Team Autobots from the previous days and merge them, you get Landfill, the first combiner unique to Robots in Disguise. Wedge forms the torso, while Grimlock, Hightower and Heavy Load can swap roles as individual legs or paired arms. In his initial Japan release in 2000 he was known as Build King, before being christened Landfill in 2001 for his North American release.
An Online Amateur Sketchpad