â€œTo have a three-way fight to beat someone like Max over another guy, of course [that means a lot to me],â€ Volkanovski said. â€œHe was the No. 1 competitor. 1 all the time. He was considered the heaviest feathered man that ever lived.1. Frank Mir. Frank Mir has spent nearly 11 years and eight months on the UFC roster, but he is still among the top heavyweights in the organization. During his long tenure in the UFC, Mir won the UFC championship and interim title.