Ultimate Autobot

The Ultimate Autobots were proposed in the Marvel Comics postion of the Generation 1 continuity family.

THERE IS NO PLACE TO RUN, ALL THE FUSES IN THE EXIT SIGNS HAVE BEEN BURNED OUTTTTTT!!

There will be no dedicated Autobot warriors!

That is my decision. Optimus Prime , Crisis of Command

Most Autobots were created for other purposes before choosing to turn their skills to fight the Decepticons. By contract, the Ultimate Autobots would have been created for no purpose other than war, with an intent of forcing a swift, brutal end to the war that would do less harm to Earth than the a prolonged struggle.

The proposed design for the Ultimate Autobots appears to be some variant of the common Guardian Robot theme. Chronologically, the Ultimate Autobots may have inspired the design of Grapple's Omega Supreme.

Fiction

Marvel Comics UK

In response to the Decepticons' creation of the Constructions, Prowl suggests that the Autobots use the Creation Matrix (now back in their possession) to create their own super-soldiers and wipe out the Decepticons. Optimus Prime refuses, haunted by the vision of the Autobots strip-mining human energy sources to fuel these juggernauts. He feels the ends do not justify the means; humans must be protected first, and he vows to never create new life simply to bolster their fighting force.

Prime waffles on this decision as Prowl continues to argue the merits of a swift, decisive victory, but eventually reaffirms his refusal to pervert the energies of the Creation Matrix.Crisis of Command

This moratorium on creating new warriors remains in place until Second Generation!, when the Matrix itself send Prime a magic vision saying "No seriously, I'm fine with you creatin' new killing machines, go for it!" His angst over the Aerialbots suitability as Autobots in Aerialbots over America! stems from this conflict.

References

From Teletraan I: The Transformers Wiki, a Wikia wiki.