Brock Lesnar. Nothing against Goldberg, but Lesnar was a fucking beast. He had size and strength, but also the rare ability to be so big and still be an awesome worker.
After their match on Smackdown and the tap out at Survivor Series '03, I SOOOOO desperately wanted a Lesnar/Benoit rivalry, which it looked like where they were headed until Benoit got sent to Raw.
Anyhow, Lesnar was the goods.