I can see The Sandman being one of ECW biggest stars... but New Jack? He was good for about 10 minutes to fill a gap in a house show or a match, other than that, probably one of the worst wrestlers in ECW history.
He was one of the more identifiable figures in ECW, whether you like him or not. He was the epitome of the "extreme" side of ECW.
I would consider The Dudleys, Sabu, Funk, and Dreamer the more "extreme" side of ECW over New Jack. Like I said, he was just a time killer.