Cheetor, the last Maximal (with some lore)
After the massive battle against Big Convoy left the Autobot base in ruins, Cheetor slowly pulled himself out of the ruins, missing both of his legs and one of his arms he crawled for hundreds of miles, fighting off death relentlessly to keep himself online.
He would eventually make his way back to where his fellow Maximals were slaughtered by Big where he would find the remains of Primal, at this point he would pass out, later being found by a disheveled Wheeljack (who had recently left the Autobots after their gross mistreatment of the Dark Energon Protoform) and Wheeljack took him and Primals remains to Wreck-Gar and the other Devcons for repair (The Devcons are a bounty hunter group consisting of Hotrod, Jalopy, Wreck-Gar, Detritus, and Wheeljack).
Wheeljack and Wreck-Gar got to work repairing Cheetor using Primals parts, they outfitted him with a chestplate containing a Sunstorm gem, a gemstone of immense power that was itself carved from a much larger and much more powerful Sunstone Crystal which was found within the earth.
When he had woken up and had been caught up to speed on his situation Cheetor fashioned himself a black helmet using scrap metal and equipped himself with a tattered black cloak and one of Primals swords, and on that day he swore he would get revenge on Big Convoy for mercilessly slaughtering his friends and family.