Abomination aka Emil Blonksy. A former soldier or asset of the U.S. army he found the machine that turned Banner into the Hulk and used it on himself. The results turned him into well, and Abomination. He is no joke. He has an above average intellect, well trained in military tactics and combat, and is on equal power with the jolly green giant himself (until Hulk amps up his strength a good threefold). Abomination is clever, strong, and manipulative. 

No particular voice form him, give it your best shot. And have fun!