#5: Circuit Breaker from The Transformers Generation 1 Marvel UK and US Comics

#4: Galvatron: From The Transformers Generation 1 Cartoon and The IDW Comic series

#3: Overlord From Last stand of the Wreckers and Tarantulas from Sins of the Wreckers

#2: Megatronus From Transformers Power of the Primes

#1: Shattered Glass Optimus Prime From The Transformers Shattered Glass Series