Ulysses Klaw

Ulysses Klaw is a supervillain with sonic powers.

Klaw was created by Stan Lee and Jack Kirby.

The Avengers: Earth's Mightiest Heroes
Klaw with a group of mercenaries went to Wakanda to steal the Vibranium, after killing the S.H.I.E.L.D. agents, Klaw and his men take the Vibranium but Hank using his powers manages to defeat the mercenaries and Klaw, Klaw runs away scared when is defeated by Ant-Man.

Later, Klaw hires Whirlwind to steal a sonic disruptor, which he replaced his right hand with it. Klaw later helps Man-Ape to take control of Wakanda so as have the Vibranium when he wants.

The Grim Reaper soon decided Klaw had outlived his usefulness and attacked him. The overcharged Vibranium turned Klaw into a living sound creature. Iron Man and Ant-Man stopped Klaw by containing his sound emitter (that had become the "heart" of the creature) inside a hollow Vibranium spike.

Ultimate Spider-Man
Klaw is a member of the Frightful Four. After Trapster, one of the Four, is defeated by Spider-Man, the rest of the Four attack Midtown High School with the belief that Spider-Man is one of the students. They escape before the police arrive, but are later defeated by Spider-Man and his team.

Avengers Assemble
Hawkeye is first contacted by Iron Man right after he stopped Trapster, Klaw and Wizard from committing a robbery.