Axis Sturmkonig
Heavily armored and with extremely lethal weapons against all targets, the Sturmkonig is primarily made to fight aircraft and does this job extremely efficiently. When the skies are clear, it can turn its weapons against enemy infantry and vehicles alike leaving only corpses and wrecks on the battlefield with only the heaviest vehicles having a chance of surviving the incoming barrage...and even then. If your army is looking for an all-comer walker, the Sturmkonig is probably the best choice if you have the points for it.
Miniatures come pre-assembled, primed and unpainted. (but ready to play!)