#1 Rhyno
The man-beast was a significant part of ECW towards the end of the promotion's run. His massive strength and ability to wipe out his competition with a single GORE meant that Rhyno was someone that was quite special in the company.
After being part of the company's invasion angle in 2001, Rhyno was again part of the ECW Invasion four years later, returning as part of a Paul Heyman-led ECW invasion that didn't back down to Eric Bischoff or any of the Raw and Smackdown Live talent.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
Once ECW returned as a WWE produced weekly program, the talent was booked accordingly. Today, Rhyno is part of the Raw brand as one half of a tag team with Heath Slater, and the pair is former WWE Smackdown Live tag team champions. While Rhyno isn't on television much that isn't to say he is any less involved. It should also be noted that Rhyno ran for state congress in Michigan.