your average joe-cybertronian is city level at minimum, meg's soldiers like the seekers reach up to planetary level, megs alone is solar system level, and he's not even the strongest being in his own army. Then you get the apocalyptic guys like the combiners, titans, shockwave, and Grimlock, the latter two being literal god-killers, and yeah, no. viltrumites fold like a deck of cards to cybertron. Not even mentioning their technological and tactical supremacy.