The greatest monsters of the squarted Circle

Over the years and more prominently today, there has been many monster type wrestlers in this buisness, guys like Damian Demento, Papa Shango and more recently guys like Kane, Undertaker, Abyss, Black Reigns and Relik.

Personaly for me the best monster has to be the Undertaker. Without a doubt he has been a dominant force for about 15 years in the WWE. And he has proven to the world that he was willing to and able to change his style of wrestling when it's needed.

So my question to you all is, who is or are the greatest monter(s) of the squared circle in the history of this buisness.

I agree with you on the Undertaker but my pick is Brock Lesnar.
Brock instilled fear in me in his first few weeks in WWE. His ring presence is phenomenal, his power is unsurpassed. He made the biggest men (Big Show) seem like mere mortals/men. Brock was one of my favorite as he really impressed, with his repeated powerbombs, his manhandling of opponents and effective execution of the F5.

One of my favorites was Randy Orton diving off the top ropes onto Brock, who caught him, rolled backwards and stood up, throwing Randy over his shoulder for the F5.....Damn that was awesome.