I'd say Skeletor.
He's evil as sin. I'm talking about the DC comics version the Evil lord of Destruction would make apple sauce out of Mumra.
I don't think any T-cat is better than any MOTU character.
MOTU is so much better and at least there human!
Has anyone every saw the kitty litter box in the Cat castle? Because thats where they'd be in the masters were on 3rd earth!