It's your toy. You don't need our validation. I do think he could work for Bumper or a bad ass Scrounge. There are quite a lot of official repurposes from the various fictions and TFWiki gives a list of them such as Protoform Optimus as Prima or E-Hobby Magnificus as Shattered Glass Perceptor. I do bulk up the ranks of the Siege Seekers with the Armada and Cybertron Voyager Seekers. Here are a few stand in's I think work quite well: Armada Starscream as Bumblebee Blitzwing. Armada Hoist as pre Beast Dinobot. Cybertron Red Scrap Metal as pre Beast Inferno. CHUG Voyager Stormcloud as Needlenose. Titanium Thrust as pre Beast Terrorsaur. Robotmasters Air Hunter as pre Beast Waspinator. Energon Divebomb as Banzai-tron. Energon Battle Ravage as pre Beast Ravage.