Kenta Miyake

From Transformers Wiki

Not really as big as Omega Supreme, but comes close.

Kenta Miyake (三宅健太, born August 23, 1977) is a Japanese voice actor. He is well-known for playing Vector the Crocodile in Sonic the Hedgehog, Klaus in Hayate the Combat Butler, Cyrus and Giovanni in Pokémon (taking over the latter role from Hirotaka Suzuoki), Grim in the Japanese dub of The Grim Adventures of Billy & Mandy, Scar in Fullmetal Alchemist: Brotherhood, and the Arbiter in Halo.