Admittedly, I haven't read this particular Transformers universe, but I have a sister who did. But either way, I'm making this removal proposal for Megatron (All Hail Megatron), or more accurately Megatron throughout the entire IDW Comics 2005-2018 Transformers universe.
Why he doesn't qualify
The reason why this version of Megatron doesn't count has nothing to do with his appearances in All Hail Megatron, it's the whole universe that matters. Thing is, he gets redeemed over the course of Dark Cybertron, More Than Meets the Eye and Lost Light. This version even has a page on the Heroes Wiki.