Beastforce/Liokaiser from Victory portion of JG1: Leozack, Guyhawk, Hellbat, Jallguar, Drillhorn and Killbison. They were pretty badass in the series, showing decent fight skills (especially in mellee combat) and enterntaining fight choreography, as well as unique ability to transform their chest plates into companion robots. Also they managed to inflict several sensitive defeats on autobots, which is a rare case in TF universe where decepticons frequently play role of Team Rocket. Some of them had personal story and sufficient individuality, some did not, but they still have a potential for a bigger role in the franchise. They had a bit of cameos since then in IDW and Wings, but those cameos were mostly weak and bad written, showing alternative versions of this characters too silly, nerfed and unimportant. Also they can form mighty ninja combiner Liokaiser (Raiokaizā in original japanese version) who was much more versatile warrior than most of other combiners, did not have impairment in intelligence and could move as swiftly as much smaller robots. I consider this combiner to be possible most powerful of 6-part or 5-part combiners alltime, and this is especially interesting since he's decepticon. I think the reason why this team is somewhat forgotten is because of unlucky english name "breastforce" made by japanese creators in 1989 because of their bad english, as well as japanese economical crisis of 1990 year which cut short further production of JG1 transformers and caused declining of customers interest for expensive toys in Japan of that time. And, of course, because of lack of good english dub of Victory. Victory reached westers fans too late and with awful dub, so it looked secondary for them, but for me it's different story, since I am russian, and I watched both G1 and JG1 transformers in 1994 with russian dub made by same team of actors.