There are numerous iconic Transformers throughout the long-running franchise, and there's much more than meets the eye with some of them. Though they were arguably created merely to sell toys, these characters have become iconic and beloved. Unfortunately, not all adaptations have served them well. Thus, some of these robots in disguise might benefit from a solo movie in the same vein as Bumblebee.
Source:https://www.cbr.com/iconic-transformers-only-thrive-in-solo-movies/